Open-Source M&A Tools

What it does

Valuation calculators, QoE checklists, deal-structure models, diligence packs, and AI agents. Built for lower middle-market deals in HVAC, plumbing, roofing, pest, landscaping, pool, and electrical. Pairs with the 20 live tools on mainstreetwealth.ai . Instant valuation, benchmarks, deal-structure modeling, and more. Pairs with the open source hub. Build a 12–36 month exit timeline with the right workstreams. Every category maps to a stage of the deal. Pick your spot and dig in. Calculators and models to size a business and defend a number. Normalize the financials, prove the earnings, and stress the quality. Model earnouts, seller notes, waterfalls, and net-of-everything proceeds. Request…from opensource.mainstreetwealth.ai

• 
  ToolHub2025 · sassifly.vercel.app · ▲13

  Free online tools & calculators

• 
  EasyUtilityHubOct 2025 · easyutilityhub.com · ▲6

  All-in-one free online tools & utilities

• 
  Utility Tools | Free Online ToolsNov 2025 · utility-tools-ecru.vercel.app · ▲5

  Calculators, converters & utilities

• 
  CalculatingHub2025 · calculatinghub.com · ▲11

  I Built a Comprehensive Suite of Free Online Tools: 300+ Calculators, Converters, and Random Generators After months of coding and development, I'm excited to share my website offering a vast collection of free online calculators, unit converters, and random generators all in one place. This project was created to simplify everyday tasks and provide accurate tools for various needs. What You'll Find on My Site: Calculators: - Financial tools: ROI, APY, mortgage calculators - Business tools: Break-even, commission calculators - Mathematics: From basic to advanced functions - Health: BMI, BMR,…

• 
  ToolMasteryHub2025 · ▲7

  Smart online tools | calculators, converters, generators

• 
  Free SMB ToolsMar 2026 · freesmbtools.com · ▲2

  Your privacy-first business toolkit, 100% free to use

• 
  Kilo Code for iOS and Android▲498

  Start coding agents, control sessions, review PRs. Anywhere.

  Dev tools · 22d ago · kilo.ai

• 
  Monospace from Directus▲445

  The governed API layer for every app, person, and agent

  Dev tools · 17d ago · monospace.io

• 
  Arcjet▲430

  Secure the AI agents you're building at runtime

  Dev tools · 18d ago · arcjet.com

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 8d ago · github.com

• 
  Open-Source eInk Bike Computer▲421

  OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.

  Dev tools · 28d ago · opentrailpaper.com

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 6d ago · github.com

• VO
  Vote on which of Hacker News' challenges for AI have been met▲195

  AI · 1d ago · stoppels.ch

• 
  Giving Opus 5.5 a simulated paint canvas▲160

  Paintings by AI models: programs run through a simulation of oil paint.

  AI · 21h ago · stillwet.art

• 
  ShipHQ▲140

  Build your own app studio, powered by your real apps

  Growth · 1d ago · apps.apple.com

• 
  Audionaut – an open-source cross-platform multitrack audio editor▲131

  Dev tools · 14h ago · github.com

• 
  Bambu Lab R1▲123

  CO2 laser cutting with Bambu-style automation

  Life & fun · 1d ago · bambulab.com

• 
  Clef▲114

  Open-source decision models from Cloudflare

  AI · 1d ago · blog.cloudflare.com