Tools I use:To future/schedule tweets

• Future tweets
• Brizzly

To post:

• Brizzly
• delicious to twitter (links)
• picnik (twitpic) to twitter (images)

To manage followers/following

• TwitterKarma: see follows/unfollows and when they posted last (can be slow)
• Mytweeple: same as above with a little more info

To manage my presence:

• Klout
• Twitterstatistics

Librarians and library people I follow

• @libraryfuture

[I follow more non-library people than I do librarians, but that's because my interests range way beyond traditional library work]