Recommended Java runtime is Java 11. Minimum is Java 8 (with limitations if JavaFX is not included).
APP4MC Platform 1.2.0 for Linux (64 Bit) - Zip-archive (440 MB)
APP4MC Platform 1.2.0 for OSX (64 Bit) - Zip-archive (440 MB)
APP4MC Platform 1.2.0 for Windows (64 Bit) - Zip-archive (440 MB)
direct link: https://download.eclipse.org/app4mc/updatesites/releases/1.2.0/
for offline installation: Zip-archive of APP4MC 1.2.0 p2 repository
For older versions please refer to: