currently allow the use of these clients, or are you looking for development guides on how to build your own? eaglerarchive/Kone-1.5.2: Kone Client 1.5.2 - GitHub
Common features found in hacked clients for vintage versions like 1.5.2
If you’d like help with a different, legitimate topic related to Eaglercraft (e.g., setting up your own server, understanding how it runs in a browser, or learning JavaScript game development), I’d be glad to assist.