Colorblind - Chroma Key song - was created in 1999.
The only program I know of is an old version of some software called Axagon Composer. It's not the greatest, but for $0.00, it's probably the best you'll get. Google it. yaeh
You can do this with a small freeware program called ProduKey.
Mckenzie
Chroma key is an effect used to layer two images or video streams together based on color. The green screen that an actor stands in front of is an example of this.
Click on the link posted in the Related Links section below. It is a site offering free video chroma key and effects editor.
If it's freeware - it doesn't require a licence key ! The whole point of freeware, shareware etc - is that the end user can use the software without charge. However, IF the user feels the software is useful, they can voluntarily donate whatever sum of money they feel the software is worth - to the program's writer.
You can purchase chroma key software for video production online from the Tube Tape website. Alternatively, you can also find this software available from Amazon.
Chroma key photography is where the subject is photographed in front of a solid-color background -- usually green or blue -- that can easily be removed in post-processing using a program like PhotoShop. This is most extensively used in videography, as it is the technology that allows the TV weatherman to appear in front of the weather maps. It is also extensively used in movies.
Try rehanfx.org
Try Rehanfx.
Final Cut Express 4 has a Chroma Keyer Identical to the one in Final Cut Pro, Final Cut Express also has other Keyers like Color Key, Luma Key, Difference matte and a host of others.