Commercial, government or institutional users must register MultiGIF for 20 UK Pounds or equivalent per copy in use. Site licenses are available for multiple users. Contact the author for more information. Source code for MultiGIF is available and may be distributed freely for non-commerical purposes. You may modify MultiGIF for your own use but you may not distribute modified versions of the source code, or modified binaries, without the express permission of the author.
Credit is given in the documentation and any on-screen credits.
No charge is made for the resulting software without the express permission of the author. If you find yourself doing more cutting and pasting that actual coding, then perhaps it's time to stop and have a little re-think. In the spirit of sharing, I would like to see people get the most they can from the source code and hopefully pass something on for others to benefit from. The little recognition we get for our work is often all there is. If you have any questions or requests, just ask.