Don't know which version of Symbian your Nokia phone uses, but a friend of mine owning a Nokia (with Symbian v5) showed me a couple of really good apps for the

Don't know which version of Symbian your Nokia phone uses, but a friend of mine owning a Nokia (with Symbian v5) showed me a couple of really good apps for the age of these phones, including a really well thought nice and functional Twitter client called Gravity (paid), UC Browser (free, with lots of features) and UC Video for playing divx and other video formats not playable with phone's default video player. Hopefully they are available for your phone too?