Glipper

Jumpcut is a macOS clipboard manager that provides Mac users with quick, intuitive access to their clipboard history, with an interface that stays out of their way. It’s been around for over fifteen years, saving users time and preventing frustration whenever they need to use a phone number, URL, or code snippet that they had just a minute ago. It’s absolutely free and open source under the MIT License. Users upgrading from 0.63 have reported issues with the Accessibility tab of the “Security & Preferences” Preferences panel, which is required to make the paste functionality work.

The traditional expectation of a clipboard is that you can copy a section of text in order to paste it elsewhere. If you copy a section, the previous one is lost. Klipper solves this problem at a stroke. The item you copied last will still be the default one to be pasted, but others will have been stored in a buffer, so you can choose to paste your selections in a different order. Even the number of items stored in the buffer can be configured! Click on the icon on your tray or panel, and you will see the possible selections, as well as some options. Possibly the two items most important to you on the general tab are whether you want the clipboard to start up empty or to retain its contents across sessions, and whether to synchronize the clipboard contents and selection. If you write scripts or work in programming this section is for you. Actions based on regular expressions can be set here.