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Here’s a few that I’ve used before:
Aptana Studio (Has FTP and Text Editing, if that’s what you’re looking for)
Notepad++ (Super Awesome Windows Text Editor)
Sublime Text 2 (Awesome Text Editor)
WinSCP (Pretty good FTP Client)
Filezilla (Another FTP Client)
@ChristopherBurton — competitive or not, Sublime SFTP is a great plug-in — easy to set up and use, with many nice options. It is a boon for ST IMO and I find the $16 price reasonable for the functionality added.
When I used Windows I loved Notepad++. There is also a really cool editor in the making that I love called InType. Although it falls short because it’s missing some functionality. It’s just so pretty! http://inotai.com/intype/