CopyQ - CopyQ : Clipboard Manager with Advanced Features.
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…
CLCL - CLCL is clipboard caching utility. * All clipboard formats are supported.
ClipX - ClipX is a tiny clipboard history manager. It is sweet, it is free, use it.
ClipboardFusion - ClipboardFusion makes it easy to remove clipboard text formatting, replace clipboard text or run powerful macros on your clipboard contents! You can even sync your clipboard with other computers an...
iClip - iClip keeps a history of everything you copy on your Mac. Very handy for storing clip-art and text clippings as well!