Customize the Steam Client with themes and plugins using the Millennium open-source framework.
Open source
24 alternativesMillennium
Millennium supports creating and managing Steam client modifications through an open source, low-code framework.
About Millennium
Millennium is an open-source, low-code framework for creating, managing and using modifications for the desktop Steam client. Users can customize the client with CSS themes and extend functionality with plugins written in TypeScript and LuaJIT, either by creating their own or downloading community-made themes and plugins.
Key features
- Customize desktop Steam client appearance with CSS themes
- Create own themes or download community-made themes
- Extend functionality with plugins written in TypeScript and LuaJIT
- Create and manage themes and plugins through low-code framework
- Use modifications without low-level interaction or overhead
Best for: Steam desktop client users who want to create or use custom themes and plugins.
Good for
- Open-source and community-driven project
- Supports both appearance themes and functionality plugins
- Designed to avoid low-level internal interaction and overhead
Millennium at a glance
- Website
- steambrew.app
- Category
- Gaming › Game Utilities & Launchers
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Millennium alternatives
Tools and sites you could use instead, ranked by how closely they match.
SteamAchievementManager manages achievements for Steam games through a lightweight portable application.
Open source
24 alternatives
A linux utility for generating 2FA codes for Steam and managing Steam trade, market, and other confirmations.
Open source
24 alternatives
Greenlight provides an open-source client for Xbox's cloud play service and home streaming.
Open source
24 alternatives
Next-Generation of Chiaki (the open-source remote play client for PlayStation)
Open source
24 alternatives
DLSS Swapper downloads, manages, and swaps DLSS, FSR, and XeSS libraries to update or change graphics upscalers.
Open source
24 alternativesPopular in Game Utilities & Launchers
Well-known listings from the same topic.
Archivearchive.org/details/MemcardRex1.8cancerogenoslabsites.google.com/view/cancerogenoslabGameSave Managergamesave-manager.comGameGuidesgamerguides.comBalatro Wikibalatrowiki.orgBetter xCloudbetter-xcloud.github.io
Is something wrong or out of date?
Tell us and an editor will check it.
Own this website?
Claim this listing
Claim the listing and suggest updates yourself. An editor checks every claim first.