Funiter (FUNction ITERation) is developed for educational purposes as a laboratory, generating graphs of several types for iteration of real and complex functions with comfortable switching between related types of graphs.
WCD is a directory changer for DOS and Unix. Another NCD (Norton Change Directory) clone. This program jumps to a (sub)directory anywhere in the directory-tree. The directory to jump to can be given by only the first characters or an expression with wildcards.