SeenSter
From SHellium Wiki
Seenster is running bseen1.4.2.tcl script and maintains a database of all nicks seen online, not just those people who are in the userlist. Simple flood protection is built-in. Wildcard searches are supported. Input is accepted from:
pub: !seen <query> [#chan] msg: seen <query> [#chan]
Queries can be in the following formats (public examples given):
'regular' !seen lamer; !seen lamest | SmartSearch-enabled query 'limited' !seennick lamer | SmartSearch-bypassed query 'masked' !seen *l?mer*; !seen *.lame.com; !seen *.edu #mychan
Bonus feature: !lastspoke <nick>
You can use wildcard matching for <nick>. The results for the first match are returned.