Mark answer as favorite/star
20118
Is there any way to favorite/bookmark an answer?
139624
Adding a way to mark answer as "partially accepted"
90029
Is it ok to answer based someone's older answer on SE?
90717
How do I combine two answers to create the best answer on stackoverflow?
53613
Adding Favorites to the Stack Exchange global inbox
75193
Standard purpose of favorites
59330
Mark an answer for a question from a deleted account
70503
Add "Answer Later" Tab
5067
Highlight tags corresponding to our favorites
56823
Change how questions marked as duplicates by the asker are represented
95144
separate reputation for questions and answers
157628
Autocomplete username references in answer posts
93630
"Answerer" and "asker"
86188
Get attention to a new answer to an old question
8518
Show answerer's related badges
90462
Marking comment as an answer?
98110
Show if/when the answer was seen by the author of the question