pngcheck is the official PNG tester and debugger. Originally designed simply to test the CRCs within a PNG image file (e.g., to check for ASCII rather than binary transfer), it has since been extended to check and optionally print almost all the information about a PNG image and to verify that it conforms to the PNG specification. It also includes partial support for MNG animations.
Xerver is a fast, tiny Web server which allows you to run CGI scripts (Perl, PHP, etc.), create aliases (virtual directories), allow/deny directory listings, create your own error pages ("404 Not Found"), allow/deny CGI scripts, password protect folders, choose your own index file extensions, share/unshare hidden files or files with certain file extensions, share unlimited folders, etc. It supports HTTP/0.9, HTTP/1.0, HTTP/1.1, and all HTTP methods (GET, POST and HEAD).
Kallimachos is a simple Web-based digital book-catalog intended for personal use. Books are indexed by title, author, translator, edition, genre, page number, and ISBN. You can insert a new book, enter the library, and search by any item. It also provides a system-info viewer. The installation is quick and simple, and the program has a user-friendly interface.