Tech
1,559 websites · most loved first · page 41 of 65· Tonble one of these
Online Tone Generator
A simple, precise online tone generator for testing hearing, tuning instruments, and exploring frequencies from 1 Hz to…
OnStartups
A long-running blog of insights and ideas for software startups, with advice for entrepreneurs on building, marketing, a…
OOER
A cyberpunk terminal-styled personal site with a boot sequence and themes, hosting stories about the web and frontend th…
Open Alternative
A directory of open-source alternatives to popular commercial software, useful for finding self-hostable replacements fo…
Open Logos
A free collection of logos for open source projects, gathered in one place for reuse in articles, slides, posters, and w…
Open Project Dashboard
A transparent dashboard of revenue and stats from Cory Zue's profitable side projects, showing what small software busin…
Open Source Afro Hair Library
A free library of high-quality 3D models of Black hair textures and styles, from coils and braids to locs, made for arti…
Open Source Alternative To
A directory of more than 500 open source alternatives to popular proprietary software, helping you find a free replaceme…
Open Source Alternatives
A directory of open-source alternatives to the commercial tools businesses rely on, for finding a free replacement for p…
Open Source Ecology
A maker collective publishing open-source blueprints for building your own farm and construction machinery from modular…
Open Source Game Clones
A huge browsable catalogue of open-source remakes and clones of classic games, from Doom and SimCity to Transport Tycoon…
Open Source Games List
A browsable catalogue of technical details on 1610 open source games and 320 engines, frameworks, and tools, useful for…
Open Source Rotary Cellphone
Justine Haupt's open-source rotary cellphone, a working mobile phone with a real spinning dial, with build notes, photos…
Open Startups
A directory of startups that publish their revenue, metrics, and stories openly, useful for seeing what real indie produ…
Open.gl
An extensive, beginner-friendly guide to modern OpenGL for game development on all major platforms, taking you from a bl…
OpenBooks
A retro-styled portal to the open web made by people rather than algorithms, with a search, directory, cool links, a man…
OpenBSD
The home of OpenBSD, a security-focused Unix-like operating system known for its clean code, strict licensing, and disti…
OpenCorporates
The largest open database of companies in the world, searchable by name or jurisdiction to look up registrations, office…
OpenGL Tutorial
Free step-by-step tutorials for modern OpenGL 3.3 and later in C and C++, from the first triangle to lighting, textures…
OpenGLBook
A free OpenGL programming tutorial in online book format, walking through the fundamentals of graphics programming one c…
Opensource.com
A community publication with articles, tutorials, and stories about open source software, hardware, and culture from dev…
Ops-Class
Hack the kernel: a free online operating systems course from SUNY Buffalo with videos and assignments where students com…
Orbital Central
Home of the Orbital Viewer, which shows atomic orbitals in all their glory, along with shareware cribbage, a picture vie…
Orchid Files
A monthly essay series and daily notes from a developer and manager who spent ten years working at startups, covering wh…
Stumble onto more like this
One click takes you to a page you didn't know you were looking for. Rate it and the next one lands closer to your taste.
Add to Browser — it's freeWorks in Chrome, Edge and Brave. No account needed.