Opendiablo2An open source re-implementation of Diablo 2
DevilutionDiablo devolved - magic behind the 1996 computer game
bncsutilThe Classic Battle.net™ client library
equineMod manager/launcher for Diablo 1
d2dxD2DX is a complete solution to make Diablo II run well on modern PCs, with high fps and better resolutions.
d2itemreaderC library for parsing items in Diablo II character/stash files
d2modmakerA program that lets you mod Diablo II from a config
portalCharacter Planner for Diablo II