If you're looking for related to this version, here’s a quick breakdown of what’s typically included in stable, solid Eaglercraft releases:
Polar Bears, Husks (desert zombies), and Strays (tundra skeletons).
The original stable version (1.0) was revolutionary, but it lacked stability. Chunks failed to load; multiplayer was a lag-fest; and redstone was essentially decorative.
Magma blocks, Bone blocks, Red Nether Brick, and Structure Blocks.
: It uses TeaVM to compile Java bytecode into JavaScript, allowing it to run the original game logic rather than being a "clone".