Currently, Eaglercraft is transitioning. The original was 1.5.2, but the new is based on 1.8.8 . However, 1.8.8 has better anti-cheat integration. Consequently, 1.5.2 remains the king of hacked clients because the protocol is archaic and vulnerable.
Eaglercraft 1.5.2 is a web-based, reverse-engineered version of Minecraft that runs in standard browsers without requiring a download. "Hacked clients" for this version are modified web clients that integrate utility mods or "hacks" directly into the browser-based interface to provide competitive advantages or quality-of-life improvements. Popular Free Eaglercraft 1.5.2 Clients 1.5.2 Hacked Client Eaglercraft Free