Something I can't remember returns the first item

caller, getpwuid, getpwent, more get* functions, but not all of them. get*nam return their third (or other) argument that they would have returned in list context.

localtime returns a pretty printed version of its list context value. readdir, <>, each, .. and m//g iterate in scalar context. qw populates @_ in scalar context. And then there are reverse and x.