These days we are witnessing great freeware development in S60 applications and the best part is that they are plugging the gap for certain essentials, S60 should have had in the first place. Here are a few I really like and use frequently.
But before that here’s a post by Ricky Cadden aka The Guru over at Symbian-Guru which lists some of the must have freewares around. It includes Mobile Signer, GPSed Beta, Call Filter, Log Exporter amongst others. They are all hosted on his mosh account for easy download, jump over for a read.