ThunderStatsThis addon adds awesome statistics to your beloved Thunderbird!
monterail-fulldarkMonterail Full Dark, a Thunderbird theme inspired by the mockup of Monterail
Google-4-TbSyncThis provider add-on adds Google synchronization capabilities to TbSync. Only contacts and contact groups are currently managed, using Google's People API.
bordercolors-dA Thunderbird add-on to color-code the compose window based on the selected identity.
autoconfigThe ISPDB, Thunderbird's database of mail configuration files.
todo.txt-extThunderbird extension for the Todo.txt application.
tbtrayA thunderbird tray icon and notification popup addon for linux
thundersecThunderSec is a security plugin for Mozilla Thunderbird that creates several pieces of additional security functionality, including DNSBL, RBL, SURBL, DKIM and SPF.
tutorialsConfiguration tutorials for a variety of mail user agents.