EQ2MAPS UI
This UI gives you the maps for every zone including all points of interest from quests to named mobs. Highly recommended!

EQ2 Traders Corner
Tradeskill information for all professions.

Adornment Guide
Interactive tool to see adornments available by slot.

RaidWiki
Wiki managed by a raiding guild with information on T5 - T7 zones.

Ventrilo
Ventrilo is a free chat program used by Solace for grouping and raiding.

EQ2i
The best place for quests, items, and general information about EQ2 run by its own community.