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  Please read the Show HN rules and tips before posting. You can browse the newest Show HNs here.                                                                            
                                                                                                                                                                             
                                                                                                                                                                             
 1.                                                      Show HN: Gravity – interactive solar-system simulator, from Newton to Einstein ( qunabu.github.io )                 
     126 points by qunabu 10 hours ago | 31 comments                                                                                                                         
                                                                                                                                                                             
 2.                                                      Show HN: GentleOS – A pair of hobby OSes for vintage 32-bit and 16-bit PCs ( github.com/luke8086 )                  
     80 points by luke8086 10 hours ago | 86 comments                                                                                                                        
                                                                                                                                                                             
 3.                                                      Show HN: A minimal linear algebra library in pure Go ( github.com/igomez10 )                                        
     2 points by igomeza 31 minutes ago | discuss                                                                                                                            
                                                                                                                                                                             
 4.                                                      Show HN: Cost.dev (YC W21) – making agents cost-aware and cheaper to call ( cost.dev )                              
     42 points by akh 5 hours ago | 23 comments                                                                                                                              
                                                                                                                                                                             
 5.                                                      Show HN: Elah – A browser-native, frame-accurate video editor ( github.com/elahlabs )                               
     2 points by paulSpaurgen 34 minutes ago | discuss                                                                                                                       
                                                                                                                                                                             
 6.                                                      Show HN: Transit-format (JSON/MessagePack) reader/writer in C ( github.com/dotfox )                                 
     5 points by delaguardo 3 hours ago | discuss                                                                                                                            
                                                                                                                                                                             
 7.                                                      Show HN: Learn from 30 historical figures, open source, nonprofit, self-hosted ( github.com/chipmates )             
     32 points by micstradev 6 hours ago | 13 comments                                                                                                                       
                                                                                                                                                                             
 8.                                                      Show HN: LocalCode – turn plain English into CLI commands with Apple's local AI ( github.com/localcodeai )          
     2 points by rahlokzero 1 hour ago | discuss                                                                                                                             
                                                                                                                                                                             
 9.                                                      Show HN: LANCommander v2.1.0 – New Avalonia-based launcher ( lancommander.app )                                     
     4 points by pathartl 1 hour ago | discuss                                                                                                                               
                                                                                                                                                                             
10.                                                      Show HN: OpenYabby, voice-controlled multi-agent orchestrator for Claude Code ( github.com/openyabby )              
     4 points by idovmamane 1 hour ago | discuss                                                                                                                             
                                                                                                                                                                             
11.                                                      Show HN: Performative-UI – A react component library of design tropes ( vorpus.github.io )                          
     1125 points by lizhang 1 day ago | 204 comments                                                                                                                         
                                                                                                                                                                             
12.                                                      Show HN: Open-source version of Anthropic's internal analytics engine ( github.com/kaelio )                         
     8 points by lucamrtl 5 hours ago | 2 comments                                                                                                                           
                                                                                                                                                                             
13.                                                      Show HN: Gitdot – A better GitHub. Open-source, written in Rust ( gitdot.io )                                       
     307 points by baepaul 1 day ago | 288 comments                                                                                                                          
                                                                                                                                                                             
14.                                                      Show HN: Nodea, an open-source AI canvas for working through complex projects ( nodea.ai )                          
     4 points by ElliottCrosby 4 hours ago | discuss                                                                                                                         
                                                                                                                                                                             
15.                                                      Show HN: AutoGPU – AI designs a real 7nm GPU, from Verilog to GDSII ( github.com/npip99 )                           
     4 points by npip99 5 hours ago | discuss                                                                                                                                
                                                                                                                                                                             
16.                                                      Show HN: Claw Patrol, a security firewall for agents ( github.com/denoland )                                        
     20 points by rough-sea 6 hours ago | 4 comments                                                                                                                         
                                                                                                                                                                             
17.                                                      Show HN: AI-native red-team for penetration testing and vulnerability research ( github.com/yv1ing )                
     2 points by yv1ing 6 hours ago | discuss                                                                                                                                
                                                                                                                                                                             
18.                                                      Show HN: ChromiumFish – Open-source fingerprint-hardened Browser for Scraping ( github.com/arman-bd )               
     6 points by armanified 6 hours ago | 1 comment                                                                                                                          
                                                                                                                                                                             
19.                                                      Show HN: A terminal writing environment with Git, E2EE sync and temporal search                                     
     3 points by sys-ronin 7 hours ago | 1 comment                                                                                                                           
                                                                                                                                                                             
20.                                                      Show HN: Cate – open-source canvas IDE for agentic coding workflows ( cero-ai.com )                                 
     5 points by Imbiss 7 hours ago | discuss                                                                                                                                
                                                                                                                                                                             
21.                                                      Show HN: I built 10 ML algos from scratch because fit() predict() are not enough ( github.com/ml-from-scratch-book )
     5 points by akmoleksandr 7 hours ago | 1 comment                                                                                                                        
                                                                                                                                                                             
22.                                                      Show HN: Command Center, the AI coding env for people who care about quality ( cc.dev )                             
     58 points by Darmani 23 hours ago | 29 comments                                                                                                                         
                                                                                                                                                                             
23.                                                      Show HN: Frhog, Your Friendly Head of Growth ( frhog.com )                                                          
     4 points by krm01 7 hours ago | discuss                                                                                                                                 
                                                                                                                                                                             
24.                                                      Show HN: Hires Chess Trainer – drill the mistakes from your own chess games ( github.com/gaelazzo )                 
     2 points by gaelazzo 7 hours ago | 1 comment                                                                                                                            
                                                                                                                                                                             
25.                                                      Show HN: Mach – A compiled systems language looking for contributions ( github.com/octalide )                       
     29 points by octalide 23 hours ago | 25 comments                                                                                                                        
                                                                                                                                                                             
26.                                                      Show HN: Run Gemini & ChatGPT UI with Python ( github.com/pseudo-usama )                                            
     3 points by pseudo-usama 8 hours ago | 3 comments                                                                                                                       
                                                                                                                                                                             
27.                                                      Show HN: Simten – design hardware in TypeScript and simulate it in the browser ( simten.dev )                       
     2 points by charlesfrisbee 8 hours ago | discuss                                                                                                                        
                                                                                                                                                                             
28.                                                      Show HN: UK sold house prices, uncapped, by postcode/county (Land Registry) ( github.com/vladignatyev )             
     5 points by v_ignatyev 8 hours ago | 1 comment                                                                                                                          
                                                                                                                                                                             
29.                                                      Show HN: Lathe – Use LLMs to learn a new domain, not skip past it ( github.com/devenjarvis )                        
     392 points by devenjarvis 2 days ago | 72 comments                                                                                                                      
                                                                                                                                                                             
30.                                                      Show HN: NoSuggest – Watch YouTube without the recommendation algorithm ( nosuggest.com )                           
     58 points by VJ-2-108 1 day ago | 61 comments                                                                                                                           
                                                                                                                                                                             
                                                                                                                                                                             
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