TunerStudio MS
Made by EFI Analytics (not an ECU maker). Free Lite edition; full features need a paid registration. rusEFI and Speeduino firmware comes from their GitHub releases, which are already an archive.
Runs: DIYAutoTune MS3Pro EVO+ (supersedes MS3Pro EVO), DIYAutoTune MS3Pro Ultimate, DIYAutoTune MS3Pro Mini, DIYAutoTune MicroSquirt V3.0, rusEFI uaEFI, rusEFI super-uaEFI, rusEFI Proteus (F7, legacy), rusEFI Hellen 121 VAG (plug-in), Speeduino Dropbear V2, Speeduino UA4C, Speeduino v0.4 DIY kit (PCB + components), DIYAutoTune MS3Pro EVO (MegaSquirt, MS3Pro, MicroSquirt, rusEFI, Speeduino)
Version history
1 version logged, newest first
Downloads here are waiting on EFI Analytics's approval to mirror. Until then, use the maker's page above.
Check the SHA-256 after downloading. Install the version your ECU's firmware needs: a newer PC application does not always talk to older firmware.