Community Manager, Elgarion, has started two threads in the forums in order to keep a list of active towns, guilds, and groups.
Guild & Group Directory
If you would like to submit your guild/group, check out this thread here: https://www.shroudoftheavatar.com/forum/index.php?threads/guild-group-directory-active.161696/
You will need to provide the guild name, description, heraldry and other links related to your guild.
Player Owned Towns Directory
Same as the guild directory, you will need to provide a town name, heraldry, description, and links. You can do so here: https://www.shroudoftheavatar.com/forum/index.php?threads/player-owned-towns-directory-active.161697/
If you are looking for an active guild or town to live in, be sure to check back on these threads. They will be a great resource to find all this information in one place!