Top Symbian s60v3 apps?

Looking for the top applications to use on my Nokia E65 which runs Symbian s60v3. I have found some sites out there, but thought you guys might know better, being as mobile as you are :-)
I am already using Fring, Opera Mini, GooSync for google calendar sync and some games… Also got my Google Apps mail account connected to the mailbox in the phone. Does anyone have experience to share? Is the mobile gmail app better than my current mail choice?