We check every product on this page once a day and record whether it still answers.
A free, open-source tool for drawing and practicing your signature with custom pens and guides, then exporting it as PNG or SVG. General-purpose, not a developer tool.
FreeNo sign-upOpen source
What to know▼
How it works
A tool for drawing and practicing your signature with customizable pens and guides, then exporting it as PNG or SVG.
Pricing
Free, open source, no sign-up required.
Best for
Anyone who wants to design or practice a personal signature and export it as an image.
We check every product on this page once a day and record whether it still answers.
An open-source, template-based design tool for building App Store and Play Store screenshots, feature graphics, and preview videos entirely in your browser or desktop app, with no account or upload required.
FreeNo sign-upData stays with you
What to know▼
How it works
pick a template, drop in your app screens, and export every required store size, including MP4 previews
What's different
an optional AI agent can build the whole listing from raw screenshots
Best for
app developers and designers preparing store listings
We check every product on this page once a day and record whether it still answers.
Lets you e-sign a document by forwarding it via email, using your provider's DKIM signature as proof instead of a signing company; open source, self-hosted or hosted, pay-per-document.
Watch out · The provider states it never holds a signing key and can't forge or alter documents — that's the product's own security claim, not independently audited.
No sign-upWorks offlineOpen source
What to know▼
How it works
Forward a document to the service and type 'I sign this document' — your email provider's existing DKIM signature becomes the proof of signing, bundled into one self-contained file anyone can verify offline in a browser.
What's different
No third-party signing company is trusted with the signature — the proof relies entirely on infrastructure (DKIM) that already exists and would still verify even if this service disappeared.
Pricing
4 free signatures, then $0.25 per document, no subscription. Open source (Apache-2.0) — self-host or use the hosted version.
Best for
People who need a lightweight, verifiable e-signature for occasional documents without paying for a full e-signature platform subscription.
Watch out
The provider states it never holds a signing key and can't forge or alter documents — that's the product's own security claim, not independently audited.
We check every product on this page once a day and record whether it still answers.
A free, open-source, browser-based ERD tool for visually designing database schemas and relationships before writing migrations. Built for developers, not graphic designers despite the tag.
FreeNo sign-upNothing to install
What to know▼
How it works
A browser-based tool for visually designing database schemas — drag out tables, define columns and relationships, and get an entity-relationship diagram.
Pricing
Free and open source.
Best for
Developers who want to plan a data model before writing migrations, not graphic designers.
We check every product on this page once a day and record whether it still answers.
A free, open-source browser tool for designing WebGL gradient backgrounds, exportable as a raw shader, CDN script or no-code iframe embed — built for developers adding visuals to sites.
FreeOpen sourceCan export my data
What to know▼
How it works
Lets you design WebGL gradient backgrounds in the browser, customizing colors, flow speed, noise and grain live, then export as a raw WebGL shader, a lightweight CDN script, or a zero-code iframe embed link.
Pricing
Free and open-source.
Best for
Developers who want to add a customizable animated gradient background to a site without writing shader code from scratch.
We check every product on this page once a day and record whether it still answers.
A self-hosted client, project and invoice tracker you deploy yourself for a one-time $49 instead of paying HoneyBook or Bonsai monthly. Built for developer-comfortable freelancers, not a no-code SaaS pick.
Open sourcePay onceNo subscription
What to know▼
How it works
Manage clients, projects, and invoices in one place: track billable hours, generate invoice PDFs, and monitor monthly revenue with a built-in chart. Self-hosted on your own Railway + Supabase stack, built with React 19, Express 5, PostgreSQL, and Drizzle ORM, deployable in under 15 minutes.
What's different
Sold as a one-time $49 purchase with full source code (MIT licensed) instead of paying HoneyBook ($19/month) or Bonsai ($25/month) recurring fees.
Pricing
One-time $49 purchase, no recurring fees.
Best for
Freelance developers, designers, and consultants at $0-$5k/month who want a real CRM before paying for Bonsai.
We check every product on this page once a day and record whether it still answers.
Paste a company's URL and it auto-generates on-brand ad creatives for LinkedIn and X using that brand's logo, colors and copy style, no login or design skills needed. Open-source and self-hostable.
No sign-upOpen sourceSelf-hosted
What to know▼
How it works
You paste a website URL and it pulls the brand's logo, colors and campaign imagery via Context.dev's Brand API, reads the homepage to match the copy tone, then generates ready-to-ship ad creatives for LinkedIn and X.
What's different
No login or asset upload required, and it's open-source and self-hostable rather than a closed SaaS tool.
Best for
Marketers who need on-brand ad creatives quickly without design skills or manually assembling brand assets.
We check every product on this page once a day and record whether it still answers.
A free, open-source, browser-based node editor for building procedural 2D/3D geometry with SDFs instead of polygon meshes, exporting to GLSL, PNG or STL — no install needed.
FreeNothing to installOpen source
What to know▼
How it works
A browser-based node editor for building procedural 2D/3D geometry from primitives, transforms and smooth boolean operations, rendered as CPU contours, GPU GLSL, or ray-marched scenes.
What's different
Uses SDFs instead of polygon meshes — you compose mathematical operations rather than editing vertices.
Pricing
Free and open source, no installation required.
Best for
Developers and designers building procedural geometry for shaders or 3D printing.
We check every product on this page once a day and record whether it still answers.
An open-source tool for building choose-your-own-adventure games with a visual node editor, playable in browser or loaded onto a 3D-printed Raspberry Pi console. You can also generate one via ChatGPT.
FreeOpen source
What to know▼
How it works
A free, MIT-licensed open-source platform for building choose-your-own-adventure games with a visual node graph editor, playable instantly in the browser or exportable via a ChatGPT prompt template, and loadable onto a 3D-printed Raspberry Pi cartridge console.
Pricing
Free and open source under the MIT license.
Best for
Developers and hobbyists who want to build and share interactive fiction games, including onto physical Raspberry Pi hardware.
