Below are some C programs we have written for various purposes. Most are just plain text files, but ones with multiple files are tarred and gzipped, so you'll have to tar -xzf them. Feel free to use these for whatever purposes you want and to modify them to suit your needs. We have checked them very thoroughly for bugs, but there may still be some. We would appreciate hearing about any you do find. Of course we can't guarantee these will work for you and we especially can't be held responsible if any of these fail after adaptation to other purposes. Still, we would be happy to assist in getting these programs to work for you. If you use any of these in preparing a publication, please cite the appropriate paper.