ddxgtx/steamswitch

SteamSwitch is a Windows desktop application for managing and switching between multiple Steam accounts. The README is written in Chinese (Mandarin). The tool runs on Windows 10 and 11 and requires the Steam client to already be installed. The core function is account switching. The app reads which Steam accounts have been logged in on the local machine and lets you switch between them from a menu, either relaunching Steam with the new account or just switching without restarting. You can set up the app to start automatically with Windows and access it from the system tray. Beyond basic account switching, the tool has several additional features. You can pin specific Steam games to a floating window on your desktop or to the Windows taskbar as shortcuts, and you can associate a default account with each game so that clicking that game's shortcut automatically switches to the right account and launches the game. There is also an optional Steam library injection feature that adds a button directly inside the Steam game detail page, letting you pick an account and launch from there. The floating window stays on top of other windows, is semi-transparent, can be locked in position, and does not appear in the Alt+Tab list. You can choose from several glass color effects and adjust its opacity and size independently from the taskbar pinning settings. The application checks GitHub for updates when it starts and can install them with one click. Settings are saved automatically with a short delay to avoid writing to disk on every keystroke. The README notes that the Steam library injection feature opens a debugging port in the Steam browser engine and may not comply with Steam's terms of service, and it should not be used while playing games that use Valve's anti-cheat system. The project is open source under the MIT license.