Thanks Captain Phatty for this :D
While still only in beta, Hell on Earth is shaping up to be one of the best mods for Diablo II. The design team managed to change nearly every aspect of the game without disturbing the overall balance, adding tons of items (including incredible class-specific stuff), a revamped skills tree with no prerequisites, and tougher monsters that drop better equipment. You'll need the expanded inventory and stash space to store the dozens of new miscellaneous items like gold and iron ore, all of which can be combined into spectacular new items using Isla's Magic Box, which makes the Horadric Cube look like a Tinkertoy.
News source: Computer Gaming World