1
Also covers game, game utilities, and open source
Millennium supports creating and managing Steam client modifications through an open source, low-code framework.
Alternatives
The Best Millennium Alternatives in 2026
24 alternatives0 free · 24 open source
Looking for something like Millennium? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 24 are open source.
About Millenniumgithub.com/shdwmtr/millennium
VisitCustomize the Steam Client with themes and plugins using the Millennium open-source framework.
Top picks at a glance
First suggestionMillenniumMillennium supports creating and managing Steam client…Another optionGreenlightGreenlight provides an open-source client for Xbox's cloud…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Millennium | — | Yes | Web |
| 2 | Greenlight | — | Yes | Linux, macOS, Windows |
| 3 | Decky Loader | — | Yes | Linux, Web |
| 4 | chiaki-ng | — | Yes | Android, Linux, macOS |
| 5 | Widescreen Fixes Pack | — | Yes | — |
| 6 | Adwaita-for-Steam | — | Yes | Linux, Windows |
| 7 | SDD GUI | — | Yes | Linux, macOS, Windows |
| 8 | Steam Bridge | — | Yes | Linux, macOS |
| 9 | TcNo-Acc-Switcher | — | Yes | Linux |
| 10 | SCMD | — | Yes | Windows |
All Millennium alternatives
2
Also covers game, game utilities, and linux · same kind of open-source project
Greenlight provides an open-source client for Xbox's cloud play service and home streaming.
3
Also covers game, game utilities, and linux
Decky Loader adds plugin support to Steam Deck, with plugins for customization and other features.
4
Also covers game, game utilities, and open source · same kind of open-source project
Next-Generation of Chiaki (the open-source remote play client for PlayStation)
5
Also covers game, game utilities, and open source · same kind of open-source project
Widescreen Fixes Pack provides plugins to add or improve widescreen resolutions in supported games.
6
Also covers game, game utilities, and linux · same kind of open-source project
Adwaita-for-Steam applies a GNOME-inspired skin to Steam, with installation notes about themes resetting after updates.
7
Also covers game, game utilities, and linux · same kind of open-source project
Manage Steam game depots and select older game versions with this DepotDownloader interface.
8
Also covers game, game utilities, and linux · same kind of open-source project
Connect Minecraft players through Steam P2P with this network proxy mod, without port forwarding or public IPs.
9
Also covers game, game utilities, and linux · same kind of open-source project
TcNo-Acc-Switcher quickly switches between accounts for Steam, Battle.net, Epic Games, and other services.
10
Also covers game, game utilities, and open source · same kind of open-source project
Download Steam Workshop items through a graphical interface for SteamCMD.
11
Also covers game, game utilities, and open source · same kind of open-source project
A linux utility for generating 2FA codes for Steam and managing Steam trade, market, and other confirmations.
12
Also covers game, game utilities, and open source · same kind of open-source project
DepotDownloader downloads Steam depots from a console application built with SteamKit2 and .NET 8.
13
Also covers game, game utilities, and linux · same kind of open-source project
Watt Toolkit is an open source cross-platform toolbox for Steam, with most features requiring Steam to be installed.
14
Also covers game, game utilities, and linux · same kind of open-source project
BoilR synchronizes games from other platforms into a Steam library for unified launching.
15
Also covers game, game utilities, and open source · same kind of open-source project
Convert Steam prices between local currencies with this browser utility.
16
Also covers game, game utilities, and open source · same kind of open-source project
Import multiple games and manage their artwork in Steam with Steam ROM Manager.
17
Also covers game, game utilities, and open source · same kind of open-source project
SteamAchievementManager manages achievements for Steam games through a lightweight portable application.
18
Also covers game, game utilities, and open source · same kind of open-source project
Change and organize custom artwork in a Steam library using the Steam Art Manager utility.
19
Also covers game, game utilities, and open source · same kind of open-source project
Retrieve Steam Workshop items using this downloader project, which provides a dedicated interface for workshop files.
20
Also covers game utilities and open source · same kind of open-source project
great-on-deck-search shows Steam Deck verification status and ProtonDB medals in the Steam Store.
21
Also covers game, game utilities, and linux · same kind of open-source project
ludusavi backs up PC game save data, helping users preserve progress across supported games.
22
Also covers game, game utilities, and linux · same kind of open-source project
Stream Nintendo Switch gameplay to a computer over USB or a network with SysDVR.
23
Also covers game, game utilities, and linux · same kind of open-source project
Homebrew App Store provides a graphical interface for downloading and managing open-source homebrew apps.
24
Also covers game, game utilities, and linux · same kind of open-source project
Create decrypted disc dumps from PlayStation 3 game discs with this utility.
No alternatives match this filter.
Alternatives to similar tools
Steam Bridge24 alternativesWidescreen Fixes Pack24 alternativessteamguard-cli24 alternativesSteamAchievementManager24 alternativesgreat-on-deck-search24 alternativesDecky Loader24 alternatives
What is the best alternative to Millennium?
Based on features, tags and platforms, the closest alternatives to Millennium are Millennium, Greenlight, and Decky Loader.
Are there open-source alternatives to Millennium?
Yes: Millennium, Greenlight, Decky Loader, and chiaki-ng.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative