Best Clipboard Manager Programs in Ubuntu

I tried Glipper and Parcellite, because they were on the repos. I ended using Diodon because neither of them worked well for me. One of them (I don't remember know which) had a bug that made it copy every single letter from a selection to the clipboard:

If I selected "foo bar" from left to right, I would get "f" "fo" "foo" "foo " "foo b" etc

in the clipboard.

I was using Diodon in 11.04 and I got back to it, even via a third PPA, in 11.10. It works great.

You could also take a look to CopyQ on GitHub, it can manage (among lot of things) multiple clipboard organized through tabs.

CopyQ monitors system clipboard and saves its content in customized tabs. Saved clipboard can be later copied and pasted directly into any application.

Items can be:

• edited with internal editor or with preferred text editor,
• moved to other tabs,
• drag'n'dropped to applications,
• marked with tag or a note,
• passed to or changed by custom commands,
• or simply removed.

Less straightforward to install than the accepted answer, but really really powerful and customizable. I fell in love with it :)