Tux Paint is a simple and entertaining drawing program geared towards young children. It has a simple interface, sound effects, and a cartoon character (Tux, the Linux penguin). Along with drawing brush strokes, lines and shapes, you can also enter text and place "rubber stamp" (or "sticker") images on the picture. Tux Paint is extensible, and could be useful in an educational environment (such as a grammar, elementary, or grade school). It's portable across numerous platforms, and runs well even on slower systems like the Pentium 133MHz.
CGI Calendar is a CGI-based event calendar that does not require an SQL database. It supports unlimited events per day that can be sorted by time and by summary. Events are editable and can be described using HTML. It features month, day, and single event views, password protection, a UI controlled by HTML templates and CSS, and support for multiple calendars with a single installation.
Helpcore is an enterprise grade help and servicedesk application. It acts as a central information hub for everybody that is involved in the help and service desk process. Managers can see overview and decision making information, system administrators can see the status of their network and software, and users can see the current status of their problems.
net2ftp is a Web-based FTP client, offering standard FTP client functionality using a browser. Users can also zip files, email them in attachments, edit code in their browser, or view code with syntax highlighting. Configuration options: restrict the access to one FTP server; ban IP addresses or FTP servers; set a daily consumption limit; and 3 kinds of logging. It works under PHP's Safe Mode. MySQL is optional (only required for logging and consumption tracking).