If PDF is electronic paper, then PDFtk is an electronic stapler-remover, hole-punch, binder, secret-decoder-ring, and X-Ray-glasses. PDFtk is a simple tool for doing everyday things with PDF documents. Keep one in the top drawer of your desktop and use it to: - Merge PDF documents - Split PDF pages into a new document - Decrypt input as necessary (password required) - Encrypt output as desired - Fill PDF Forms with FDF Data and/or Flatten Forms - Apply a Background Watermark - Report PDF on metrics, including metadata and bookmarks - Update PDF Metadata - Attach Files to PDF Pages or the PDF Document - Unpack PDF Attachments - Burst a PDF document into single pages - Uncompress and re-compress page streams - Repair corrupted PDF (where possible)

Zoom is a player for Z-Code stories or games. These are usually text adventures (also known as interactive fiction), made popular in the eighties by Infocom with its Zork series of games, and others.

Auto Adjust Photo is a tiny command-line image manipulation tool for automatic color correction of photos. It tries to make the picture look better. The program does this by analyzing the input image and then sets the most optimal contrast, gamma, color balance and saturation for it.

ext4magic is a file carver (or file carving). It can be used when recovering from disasters or in digital forensics activities.

Nagios is a monitoring and management system for hosts, services and networks.

mate-calc is a powerful graphical calculator with financial, logical and scientific modes. It uses a multiple precision package to do its arithmetic to give a high degree of accuracy.