You can find community-shared copies on Google Drive or Google Docs archives.

: Source code and compilation utilities are available on the Eaglercraft-Archive and 3kh0/eaglercraft-1.8 repositories.

Eaglercraft runs on a single CPU thread.

The 1.8.8 version is specifically optimized for better FPS and smoother gameplay on lower-end devices compared to older versions like 1.5.2. How to Download and Run (FREE)