For those in their 20's to 30's...
http://www.catholicsoncall.org/

http://bustedhalo.com/


For those Catholics who have been away from active participation...
http://www.oncecatholic.org/
http://www.catholicscomehome.org/#

For those looking for prayers... http://www.sacredspace.ie/

Looking for the latest "news" going on in the Church, then check out...
http://whispersintheloggia.blogspot.com/
http://www.americamagazine.org/blog/blog.cfm?blog_id=2
http://www.catholicculture.org/news/