Two Mods have been added.

D2Accelerator by FoxBat
Diablo II often slows or stutters on machines well above Blizzard's "recommended" system specifications. High-level characters can quickly re-cast spells over and over bringing your computer to a grinding halt, or a huge army of monsters and minions can make the game unplayable. This mod was created to adress these issues. It should improve your framerate with lower-detail graphics in some cases without looking bad, and is client-only and thus fully compatible with standard D2:LoD singleplayer and multiplayer. It will NOT improve your "network lag" online, servers that respond and update slowly will be the same as ever.

Download:
D2Accelerator

Seven Lances by FoxBat
The purpose of this modification is to create a more balanced and challenging Diablo II: Lord of Destruction, and while playable in single player, it emphasizes the dynamics of a well-built party. All skills, items, and monsters have been adjusted towards this end. Additionally, many new items, monsters, and levels have been introduced to make the experience fresh. We at the Seven Lances team hope you enjoy this new take on Diablo II.

Download:
Seven Lances