Dothack Network
One of the largest active .hack communities online.
.hack
CyberConnect2
dothackers//bbs
Oldest surviving discussion forum dedicated entirely to .hack.
.hack//Translate
Fan translations of Japanese-exclusive .hack materials.
r/DotHack
.hack//INFO
.hack//Wiki
.hack//Brasil
Community dedicated to connecting Portuguese-speaking .hack fans.
Lindz
Archive of guides, databases, and reference materials for the games.
Falions
Fan timelines and translations from Japanese-exclusive .hack materials.
Wielant
Collection of original stories and fan projects inspired by the world of .hack.
.hack//ENEMY
Fan webpage preserving and supporting the .hack//ENEMY trading card game.
That Dot Hacker
One fan's journey through .hack, shared through reviews, news, articles, and retrospectives.
.hack PIXIV
Community-maintained wiki and hub collecting fan-created artwork.