pyEdit for Symbian S60 is a powerful text editor for Symbian S60 2nd and 3rd Edition mobile devices written in Python. It features an inbuilt file browser and hex editor too.

Complete set of features are:

-capable of handling multiple documents simultaneously
-copy/cut and paste
-search and replace
-possibility to save text using UTF-8, UTF-16, Latin, ISO-8859-1, and ASCII codings
-’hex-editor’
-user definable pre-written sentences
-a file browser
-favorite documents list -sending text document using one or more text messages
-jumping to the beginning and end of the document/line using joystick
-user configurable screen size
-user configurable font and font color

Make sure you have Python for Nokia S60 installed before trying to install this application

Download links-

S60 2nd edition version here
S60 3rd Edition version here