I remember viewing a page having monthly achievers, daily top rankers or something like this. But now I am not able to find a link to that. May be its just in front of me and I am just overlooking it.
What is meta?
- Any Stack Exchange user can ask a question
- The community provides support, votes on ideas, and reports bugs
- Your voice helps shape the way Stack Exchange operates
We don't have a list of monthly achievers or anything. However, we do have a tag stats page, which lists the top scores in participation in the tags for both question askers and answerers. There is a list for the scores over the course of the last 30 days, and one for overall. You can access these when browsing any tag by clicking the "stats" tab at the top.
An example, for C# on Stack Overflow: http://stackoverflow.com/questions/tagged?tagnames=c%23&sort=stats&pagesize=50
Check out this answer for a look into how score is calculated.
Originally, tag stats would allow combinations of tags like [java]+[swing]. This was apparently never intended and caused problems, so the functionality has been removed.
Reputation leagues are now rolled out:
Two bits that Grace's answer didn't mention: