CamStudio
Open source and free screen capture program. Records in AVI video files and can convert to .SWF format. CamStudio and the Codec are released under the GPL.
Jing Project
A free and "lite" version of SnagIt and Camtasia(both made by Techsmith.)
Freebinar
Offers free screen recording as part of your Freebinar account.
Vyew
Free web conferencing includes screen capture and session recording with your account.
iShowU HD Pro (free trial)
Screencapture software for MAC users. Free trial version places overlay ad across their videos.