ImageOptim - Faster web pages and apps.
Ditto - Easy to use interface; Search and paste previous copy entries; Keep multiple computer's clipboards in sync; Data is encrypted when sent over the network; Accessed from tray icon or global hot key; Select entry by double click, enter key or drag drop…
Transmit - Transmit is an FTP client for Mac OS X and Mac OS Classic (which is unsupported).
CopyQ - CopyQ : Clipboard Manager with Advanced Features.
CodeKit - CodeKit allows you to optimize the performance of your website by automatically and efficiently compiling a variety of popular languages.
Clipy - Clipy is a clipboard extension for macOS.