Mal:UserSummary

"talk" -- User talk page

"contribs" -- User contributions

"deleted contribs" -- accessible to admins only

"lwhat links to user page" -- Wikipedia pages linking to user's userpage

"count" -- edit count (Interiot's tool)

"COIBot" -- links to the COIBot user-report (if generated)

"search an, ani, cn, an3" -- searches selected noticeboard entries such as WP:ANI

"user page logs" -- logs of actions taken on user's account or user page

"x-wiki" - search contributions on all 700+ Wikimedia Foundation projects

Uses http://toolserver.org/~luxo/contributions/contributions.php]
Note: this tools works intermittently and may sometimes miss contributions on entire projects. For the sake of brevity, it lists no more than 20 contributions per project.

"status" -- Is the user an admin, bureaucrat, etc.

"Linkwatcher search"-- searches for all external links added to en.wikipedia from early June 2007 onwards

Uses http://toolserver.org/~shadow1/cgi-bin/linksearcher.pl
Note: This tool sometimes misses link additions
This tool also picks up link additions that are reversions of page blanking by vandalism patrollers and anti-vandalism bots, so not every link addition you turn up with this is spamming!
This version here doesn't properly handle queries with a space in them

"Google"" searches user name