I usually find spreadsheets harder to compare when it gets bigger (similar to the comparison table on wikipedia). I have added the first few sub-lists on Romku:

http://www.romku.com/list/343885/communication-phone-mail-st...

http://www.romku.com/list/343886/bug-tracking-issue-manageme...

http://www.romku.com/list/343887/collaboration-filesharing-s...

http://www.romku.com/list/343889/customer-relations-software...

Please let me know if you find it easier to navigate and I'll create the other ones (you can see the lists of lists here: http://www.romku.com/lists)