Review of iClip powered by the Slant community.
Records the clipboard automatically. Works well with text and images. AppleScriptable. Many hot keys, allowing use of the keyboard instead of the mouse for fast access. Highly configurable. Fast support. Free unlimited trial.
SpecsUpdate
Price$15
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Pros
Pro Easy to use
Pro Stays out of the way when you don't need it
Pro Highly customizable
Freely settable hotkeys, many options for positioning, when to make it appear, and how to handle specific applications. AppleScript is a plus, too.