LeanFPS
LeanFPS is a lightweight game optimizer for Windows 10 and 11. It detects running games, applies per-game Windows tweaks, and measures average FPS and low-percentile frame rates using Windows event tracing. It includes a tray mode, session history and individually reversible tweaks. The published optimization list excludes disabling Microsoft Defender, Memory Integrity, the firewall and Windows Update. The free edition includes game detection, FPS measurement and core tweaks. Pro currently costs US$19 once (early-bird pricing). The official site lists a roughly 5.9 MB installer and 6.5 MB installed size. Gains depend on the PC and game; no fixed FPS increase is promised.