This is a calendar program currently under development, with a bizillion features to come. The current user interface is a substitute for the real interface, which hasn't been written yet. The file format it uses will at least be upward compatible, so it is safe to start using the program now if you find it to be useful. Your appointments are stored in a file called .tc in your home directory. Your userlist (in the appointments window) is stored in a file called .people. They will eventually occupy a subdirectory.