Lemmings Clones
Lemmini - Volker Oth / 0xdeadbeef
Lemmini is a Java clone of Lemmings for Windows but with the original Lemmings music and an improved game engine and interface. In order to play this clone, you must have a copy of Lemmings for Windows, from which Lemmini can extract graphics and sound effects.
Lemmix Clone - Eric Langedijk / EricLang
Lemmix Clones are Lemmings, Oh No! More Lemmings, and Holiday 93 clones for Windows. These clones attempt to be very similar to the DOS versions of Lemmings; however, they also feature replay and fast-forward.
Lemmings++ - SimonN
Lemmings++ is an open-source Lemmings clone. It is the first and only clone to feature networked multiplayer — up to 8 players. (Downloads are mirrored here.)
Lix - SimonN
Lix (also on github) is the continued development of Lemmings++ without using art or sounds from the official games.
Tundra - Covox
Tundra is an open-source clone of Lemmings written in Python. It requires a copy of Lemmings or Oh No! More Lemmings for DOS to play.
Lemmings DS - Matt Kamineko
Lemmings DS is an open-source clone of Lemmings for the Nintendo DS. There is also a Lemmings DS level editor.
PocketLemmings - Johannes Zeppenfeld / zennehoy
PocketLemmings is a Lemmings clone designed for Pocket PCs. For those of us without PocketPCs, there is a Windows version as well.
DHTML Lemmings - Tino Zijdel / crisp
DHTML Lemmings is, as the name states, a clone of Lemmings in DHTML. This clone has been discontinued by its author and is somewhat incomplete -- the gameplay is very well done, but only the first ten levels from each difficulty are available.
Cheapo - Peter Spada / Essman
Cheapo Copycat Game is a Lemmings clone that does not attempt to exactly copy the original game engine, but instead adds some interesting features. Although Cheapo is very customizable, it's a bit buggy. (Sorry, no downloads.)
Copycat - Peter Spada / Essman
A Copycat Game is extinct.