badges based on tag questions
119253
Why no tag Badges for Good questions
22588
Do we have different badges in different SE sites
35575
Automatic tag suggestions
148807
Badge suggestion: Zealot (got 3 questions with at least 10 downvotes each)
7142
Showing meta questions in the same manner as linked and related questions
58500
Clicking tag in question should present a list of questions
144724
Per-tag breakdown of reputation in answers
93665
Is there a way to see questions with a certain tag from all Stack Exchange sites?
108220
Custom question lists: finding questions you can answer
107498
Answering tag questions
85415
Filtering questions based on my Favorite Tags
13508
Can we have cross-site badges?
62530
Voting for competing answers (Sportsmanship badge)
8875
How to implement a reputation based system with badges in Drupal similar to StackExchange sites?
36163
Reputation for Badges
76082
Tooltips on the badges page need checking
77290
Why do we tag questions?