CotEditor is a open sourced, Cocoa-based plain text editor for OS X. It supports syntax highlighting, powerful find and replace with OniGmo (regular expression engine) and other small goodies for coding. It can handle also CJK languages well.  Version 0.0.0:  Additions/Changes  Revert find panel behavior to select always whole text in find field when the panel is called.  Fixes  Fix line number drawing with large line numbers.  Fix an issue where the external modification notification did not work.