Mainplate

What it does

I've been flipping watches for years with the same doubt after every sale: was this actually worth it? Mainplate tracks every flip — purchase price, parts, hours worked — and tells you the real ROI. Not the optimistic one. Personal collection, parts inventory, timegrapher log with diagnostic warnings. No cloud, no subscription. Just Docker and your data.

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  SpendLogDec 2025 · ▲116

  See exactly what you bought, not just what you spent.

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  Flips Watch 2.02022 · ▲67

  Analyze your NFT trading history and profits

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  Rig FlipFeb 2026 · ▲6

  Inventory and profit tracker for PC flippers

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  FliprForgeJul 2026 · app.fliprforge.co.uk · ▲7

  Track parts, builds and profit for PC flips with AI Insights

• IM
  I made a price aggregator to find the best PC parts deals across eBay2025 · pcprice.watch · ▲20

  Started PC flipping as a hobby (buying used parts, building PCs, and selling them for a small profit). Found that focusing on used parts on eBay gives the best margins - like finding a GPU 20% below market, pairing it with other deals, and selling the complete build locally. I discovered that eBay marketplaces (.com, .de, .co.uk etc.) often have different prices for the same items! Or just completely different items. So I built an eBay price scanner for PC components. It scans listings across different Ebay markets, calculates median prices, and flags anything selling below market (including…

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  FlipperHelperMay 2026 · flipperhelper.app · ▲4

  From car boot to eBay — track every flip's real profit

• 
  Dograh▲592

  The open source VAPI alternative

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  Meridian▲530

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  x1▲516

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  Computable GPU Index (CGI)▲424

  The first open-source price index for GPU compute

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• 
  Open-Source eInk Bike Computer▲404

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  Dev tools · 2d ago · opentrailpaper.com

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  The GTM Co-Founder▲402

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  Brila▲1,367

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• AG
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  Life & fun · Apr 2026 · jaso1024.com

• IB
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  Built a ~9M param LLM from scratch to understand how they actually work. Vanilla transformer, 60K synthetic conversations, ~130 lines of PyTorch. Trains in 5 min on a free Colab T4. The fish thinks the meaning of life is food. Fork it and swap the personality for your own character.

  AI · Apr 2026 · github.com

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  Fathom 3.0▲803

  AI meeting notes: now bot-free, in ChatGPT & Claude + more

  AI · Apr 2026 · fathom.ai

• BC
  Brutalist Concrete Laptop Stand (2024)▲786

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• IB
  I built a frontpage for personal blogs▲783

  With social media and now AI, its important to keep the indie web alive. There are many people who write frequently. Blogosphere tries to highlight them by fetching the recent posts from personal blogs across many categories. There are two versions: Minimal (HN-inspired, fast, static): https://text.blogosphere.app/ Non-minimal: https://blogosphere.app/ If you don't find your blog (or your favorite ones), please add them. I will review and approve it.

  AI · Apr 2026 · text.blogosphere.app