The best text editor ever! Very very light!
Kwrite is good editor for manipulating text file. Fantastic and ease in use is mode "regular expression". Option in menu "Replace" for find and replace any pattern is very usable. This is very good software.
KDE-Times often used.
Good and Easy
Good, with a text/alphabet (default) is more slim and colorful.
great and easy
A very basic text editor.
Good text editor for KDE4, if you want more features like multiple files open at a time; try kate.