Daystrom Institute Technical Library
This site is a true goldmine for story research. It has every fact from Star Trek you could think of. From Crew bios on the main characters from all series, to technology used in Star Trek. Are you looking for some information? 95 % sure you will find it here.
An archive site that has a lot of stories, and a lot of pairings. Very well maintained and kept up-to-date by the wonderful RalSt. If you are looking for something to read, go have a look there.