I've found Newtscape to be the best with NetHopper a very close second, a word of warning though, surfing on an eMate is going to be slooooow. It's slow on my 2000 which has a 162 mhz StrongARM cpu, the emate only has a 25 mhz chip.

For email (IMAP) try MailV

and for all your other eMate needs: http://www.unna.org/