Almost every day I use Notepad++ for text file editing and from time to time to look at source files like Javascript and CSS. It supports syntax highlighting for various languages, which I find very useful. Notepad++ supports various plugins and does also have a column editing mode. To enable column editing mode just hold the "Alt" key and select the text with your left mouse button.
Notepad++ can be found here.
Some useful features of Notepad++:
- Syntax Highlighting and Syntax Folding
- Find and replace over multiple documents
- File comparison
- Zoom in and zoom out
- Multi-Language environment supported
- Drag-and-drop