Remotix - Remotix is a fast and powerful application to easily access multiple Macs (and PCs).

buffr.io - Have a synchronized text and file clipboard available under a unique link. Realtime web clipboard.

AnyDesk - AnyDesk is the world's most comfortable remote desktop application. Access all your programs, documents and files from anywhere, without having to entrust your data to a cloud service.

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…

cl1p.net - cl1p.net lets you move information between computers using your brain. For security the information in the url is destroyed as soon as it is read. Anyone visiting the same URL at a later time will not be able to see the message. cl1p by Rob Mayhew.

Permanent clipboard - How many times you wanted to keep important, but hard to remember, information at your mouse click...