Searching for questions that have ONLY a given tag (i.e. add a range operator for tags)
82039
Search for singleton tags on questions
58500
Clicking tag in question should present a list of questions
90883
Tags on badge question list
153457
Search on specific content
106532
Tag hierarchy to browse through tags
85415
Filtering questions based on my Favorite Tags
21351
Could we make tags imply other tags?
98192
Can't search unanswered questions with multiple tags
83017
Is there a way to tag a question as old or outdated?
128084
Search viewed questions
57575
Is there a way to search for a question (or an answer) that mentions a tag?
77512
New Div - "Hiding questions because of your Ignored Tags preferences for tags"
83089
Show x0 or x1 for tags with only 0 or 1 question
69062
Please add a tag search functionality to Careers
26374
How to search a string in the list of answers added by me on Stack Overflow?
96267
How to check if post has any tag?
87240
Search by multiple tags