OBS Studio
An open-source application for recording and live streaming with scenes and sources.
All sites
Browse hand-picked design inspiration, development tools, and research resources. Read an introduction before visiting the official site.
1976 sites, sorted by name. Showing 1201–1248.
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Obsidian
A Markdown editor and knowledge-base app built around local plain-text notes and links.
OCaml
Your First OCaml Program walks through switches and compilation. Useful when you need to understand the opam environment and program flow.
Ocean Observatories Initiative
Explore an ocean observing network and its data.
Ocenaudio
A cross-platform audio editor for inspecting and processing recordings.
October CMS
Laravel-based site and extension management
Odin
Data-oriented native programming
OEC
Compare countries, products, and bilateral trade data.
OER Commons
Discover openly shared lesson and course records.
Ogimet
Search actual observations from weather stations worldwide.
OH no Type
A foundry presenting expressive retail and custom typefaces.
OKD
Integrated platform for Kubernetes applications
OKLCH Color Picker
A picker and converter for working with OKLCH colors, including P3 and sRGB fallback comparisons.
Okteto
Cloud development environments
Omatsuri
Use frontend utilities for color shades, CSS gradients, SVG compression, encoding, and related tasks in one browser app.
Omnivore's Cookbook
Home-cooking recipes featuring Chinese dishes and Asian-inspired flavors.
On The Go Map
A route planner for walks, runs, and rides with distance information.
Once Upon a Chef
Home-cooking recipes presented with step-by-step photographs.
One Page Love
One Page Love focuses on one-page websites and landing pages.
OneGeology
View geological layers through global map services.
OneNote
OneNote focuses on notebook-style text and handwritten notes.
OneZoom
Explore species relationships on an interactive tree of life.
Online Encyclopedia of Integer Sequences
Look up integer sequences by identifier, with terms, formulas, and references.
Online Go Server
A browser-based Go server for games and community participation.
Onlook
An open-source visual editor that puts existing React components on a canvas and writes changes back to code.
Onsen UI
Onsen UI offers components for mobile web interfaces.
Onshape
A product-development platform combining CAD and design-data management.
OPA
Structured-input policy evaluation with Rego
Open Color
Open Color is a color palette for interface work.
Open Context
Explore archaeological data and field documentation.
Open Culture Free Courses
Browse a subject-organized list of open online courses.
Open Development Mekong
Read background articles on development in the Mekong region.
Open Energy Platform
Explore energy data and shared descriptive standards.
Open Foundry
Open Foundry focuses on open-source fonts with live previews.
Open Knowledge Maps
Explore scientific literature through topic maps.
Open Library
Discover books through catalog records and subjects.
Open Props
Open Props supplies reusable CSS custom properties.
Open Science Framework
Explore research projects, preregistrations, and shared files.
Open Source Shakespeare
Search words and passages in Shakespeare's works.
Open Tree of Life
Query a synthetic phylogenetic tree and species relationships.
Open Yale Courses
Browse Yale's open-course syllabi and lecture lists.
OpenAI Codex
An AI coding agent for software-engineering tasks.
OpenAIRE
Explore European open science outputs and data services.
OpenAlex
Search scholarly works, authors, institutions, and citation links.
OpenBao
Centralized application secret management
Openclipart
A community library for vector clip art and SVG imagery.
OpenCode
Coding agents in terminals and editors
OpenCorporates
Trace legal entities through company records.