ImageOptim - Faster web pages and apps.
IconsExtract - Extract icons and cursors stored in EXE, DLL, OCX, CPL files
Transmit - Transmit is an FTP client for Mac OS X and Mac OS Classic (which is unsupported).
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
CodeKit - CodeKit allows you to optimize the performance of your website by automatically and efficiently compiling a variety of popular languages.
IconViewer - Bot Productions's IconViewer utility allows you to view, copy, and save the icons in a file through its property sheet.