Textastic Code Editor for iOS 50% off Today Only, $4.99

Textastic is a fast and versatile text, code and markup editor supporting syntax highlighting of over 80 programming and markup languages. Connect to FTP, SFTP and WebDAV servers or to your Dropbox and iDisk accounts. Use the built-in WebDAV server to easily transfer files from your Mac or PC over Wi-Fi.

It's the perfect app to view and edit your website and source code files at home, in the office or on the road.