ArsClip
ArsClip is a FREE (freeware) utility for the windows clipboard. ArsClip monitors the clipboard and keeps track of the entries. Press a configurable hotkey and select an item (or items) to quickly paste into a program.
ArsClip used to be barebonez, but I think I can safely say that it has become a nicely featured program (due to user requests for changes). ArsClip remembers the last 15 (default) or more text entries entered into the Window's clipboard and can be configured to monitor non-text items. Delphi 6 (Personal) source code is included - modify it freely for any non-profit use.
Requirements
This program was written with Delphi 6 (now Turbo Delphi) and requires no installation. It has been tested on Windows 98, Windows ME, Windows 2000 Professional, Windows XP Professional. Tested on Vista started with version 3.0.1.