Most of the new Nokia S60 devices come with the built-in Office suite applications. Apart from that, there are some other mobile office suites available on the market. R’Copeh’s Blog has a great post with mobile word processor comparison chart. Author argues that compared to the software that costs you extra, the built-in office suite (Word) seems rather well accomplished. Good read.
Also, while you’re there don’t forget to check out the free wallpapers for the Nokia E61. 🙂