Themes GitHub Repositories (2026) · Open Source Tools

🙃 A delightful community-driven (with 2,500+ contributors) framework for managing your zsh configuration. Includes 300+ optional plugins (rails, git, macOS, hub, docker, homebrew, node, php, python, etc), 140+ themes to spice up your morning, and an auto-update tool that makes it easy to keep up with the latest updates from the community.

Free and open source admin dashboard UI kit built on Bootstrap: 100+ pages, 6,000+ icons, dark mode, RTL.

ReaLTaiizor is a .NET WinForms control library that offers a wide range of components and is user-friendly and design-focused.

A fast, native and beautiful desktop viewer & editor for markdown and code with PDF export and eBooks rendering.

Tiny alternative Discord client with a smaller footprint, snappier startup, themes, plugins and more!

Customize Claude Code's system prompts, create custom toolsets, input pattern highlighters, themes/thinking verbs/spinners, customize input box & user message styling, support AGENTS.md, unlock private/unreleased features, and much more. Supports both native/npm installs on all platforms.

An open-source framework for Steam Client themes and plugins

Turn your Mac into a retro computer: real-time CRT/retro shaders and classic desktop themes (Mac OS 9, Windows XP, BeOS and more), as a macOS menu-bar app.

MixMusic: Spotify and YouTube Music in one player. Open-source desktop music player for macOS, Windows & Linux: one search, one queue, mixed playlists, synced lyrics, and equalizer with community themes and plugins.

A community Bash framework.

The cutest Discord modification

A dependency free and extensible Java library for styling and beautifying terminal output

Theme from Chinese traditional color for IDE, Terminal, Agent, etc

Home Assistant Theme Store

The Windows themed keyboard for Android with Windows 98, XP, Vista and Windows Phone 8.1 themes. No trackers, no network, typing stays on the phone.

Minimal calendar widget