I've tried other clipboard managers, but none has tempted me to switch from Clipmate, which I've used and loved for a zillion years, more or less. Two features I especially value in Clipmate are its "
Power Paste" feature that enables me to insert a series of clips automatically, and, above all, the
ClipBar, which shows you the clip currently set to be pasted (usually the most recent clip). All you have to do is glance at the ClipBar. You don't have to open anything, mouse over anything, or do anything else except glance at the ClipBar sitting at the bottom of your browser. For me, the absence of either of those two features is a deal breaker.
At one time, I was moderately impressed by a program called
ClipCache Pro. It had several features that Clipmate lacks, including support for Unicode. It also offered a Power Paste feature, though I found it didn't work as well as it does in Clipmate. And ClipCache Pro didn't have a ClipBar. After trying for a couple of months to switch from Clipmate to ClipCache, I gave up and returned to using Clipmate exclusively. As I still do.