
FreetCode — Free Algorithm Interview Prep
Practice algorithm interview problems with solutions and interactive visualizers.
@Galliard232634 · X
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Practice algorithm interview problems with solutions and interactive visualizers.
@Galliard232634 · X
Come study with me on

Free online tools for developers, creators, and businesses. No bloat, no hassle.
@toolatu · X

Collection of 125+ free calculators for finance, health, legal, real estate, and travel—no signup required.
@Arafat3599651 · X
Just launched 🧮 125+ free calculators — mortgage, BMI, debt payoff, compound interest, calories & more. No signup. No ads. Everything runs in your browser instantly. #buildinpublic #webdev #react

Free online tool for creating flowcharts, process diagrams, org charts, and UML diagrams.
@N0V4Dev · X
I found a tool called Next AI that links AI capabilities directly with diagrams. It lets you build and edit diagrams using natural language prompts instead of clicking around the canvas manually. It's a handy way to sketch out architecture when you don't want to drag every box yourself. The project is built on TypeScript with React 19 and Next.js. It supports multiple AI providers and even includes an MCP Server. This means you can use it with the Claude Code CLI to generate diagrams from your terminal. Deployment options are flexible too. You can run the tool locally with Docker or push it to Vercel and Cloudflare Workers. It supports multi provider setups so you can pick the backend that fits your workflow. #Nextjs #AI #Diagrams #TypeScript

Convert and edit audio, images, PDFs, and videos with 150+ free online tools, no signup required.
@factfile0 · X

Free tools to convert, compress, and edit files directly in your browser without uploads.
@faisalhaleem · X
Just launched — free browser-based file tools runs entirely in your browser. Video to GIF (with trim slider) Merge / Split / Shrink PDF Your files NEVER leave your device. No sign-up needed. Free forever. #buildinpublic #webdev #indiedev #tools #privacy

Use 300+ free AI-powered tools for HTML, CSS, images, SEO, and more without registration.
AI 驱动的免费在线工具平台 — 提供 300+ 实用工具,无需注册即可使用

Free online tools for editing and converting PDFs, images, videos, JSON, SVG, and email files.
@bigchusstheory · X

200+ free browser-based tools for invoicing, rentals, online selling, and real estate—no signup needed.
u/Cryingpinaple · Reddit
Built a free toolkit that grew into 5 sites, 200+ tools, no signup required I started this a few days ago to build a free invoicing tool for freelancers because everything I found was gated behind a signup wall or a "free trial." It turned into a small portfolio of 5 sites, each aimed at a different kind of solo operator: Ledgerline: invoicing, contracts, and tax calculators for freelancers Rentline: rent increase letters, late fee calculators, and lease guides for landlords Sellerline:

Free online PDF editor with 51 tools for merging, signing, OCR, and translation—works offline, no login needed.
@zubidavies · X

NoCloudware — Software you own, not that you rent. 100% local tools, no subscriptions, everything runs on your PC.
@adrian_goodrich · X

Free HIPAA compliance scanner that reviews your app for security risks and regulatory gaps.
@specodeai · X
The biggest AI app builder just dropped "vibe coding" from its messaging and pivoted to "trust" and "security." The market learned what healthcare builders already knew: when the data is PHI, vibes do not pass an audit. Free HIPAA scan: