Yes there are -BUT a word of caution - Google in particular knows the Directories used by these submission Companies - it can spot 'Bought Links' from a mile - and this is where the PR myth gets well and truly unfrocked - Some of those Directories may well be PR 4 - 6 or above - But if you have bought your way in as part of a 500 submission process those high PR sites will count for bugger all -you may get penalised. Doing them in batches of 50 would probably be safe.
I'll give you just one Directory that Google truly loves
www.mygreencorner.com