There is this page in the Lazarus wiki which probably has most of Lazarus components (it includes some components not found in CCR). Its pretty well searchable. There are also the forums and the mailing list where components are announced (and usually are mentioned in the above wiki page).
Lazarus isn't as popular as Delphi or other solutions, so its not that easy to find stuff for it :-/. Although porting components from Delphi isn't a very hard process - many components available for Lazarus were originally Delphi components.