Mathstub

What it does

RSU, ESPP, ISO/AMT, quarterly estimated tax, and a 50-state stock-comp lookup. Free, no signup, math straight from IRS publications. The calculators run client-side; no data leaves your browser.

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  Uprise Best Stock Options Tax Calculator2023 · ▲92

  Calc your startup stock option taxes (+state & AMT) for free

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  Roots & Receipts Tax CalculatorJul 2026 · rootsandreceipts.com · ▲2

  Know your profit and tax, in seconds. Free.

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  FiguresNestJun 2026 · figuresnest.com · ▲3

  Free 2026 tax calculators for 1099 & self-employed workers

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  Finance Tools HubJun 2026 · financetoolshub.net · ▲4

  Financial clarity for life's big decisions.

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  EveryCentCalc26d ago · everycentcalc.biz.id · ▲2

  Free tax & money calculators for freelancers

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  CrypTaxJun 2026 · cryptax.pro · ▲2

  Free crypto tax calculator — no signup, no email

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  PaymentKit▲466

  Billing that survives a processor shutdown

  Commerce · 13d ago · paymentkit.com

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  Equitybee Benchmark▲241

  Compare your startup equity grant for free.

  Commerce · 26d ago · equitybee.com

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  Brew ▲905

  Like Claude design for email marketing

  AI · May 2026 · brew.new

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  Kilo Code for VS Code▲897

  Parallel agents, diff reviewer, and multi-model comparisons

  Dev tools · May 2026 · kilo.ai

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  StoreClaw▲805

  Grow your store profits with agents that know how to sell

  AI · May 2026 · storeclaw.ai

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  PollyReach▲796

  Give your agent a real number and voice to make calls.

  AI · May 2026 · pollyreach.ai

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  Needle: We Distilled Gemini Tool Calling into a 26M Model▲776

  Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…

  Life & fun · May 2026 · github.com

• FM
  Files.md – Open-source alternative to Obsidian▲730

  Dev tools · May 2026 · github.com