BindGraph is a very simple DNS statistics RRDtool frontend for BIND9 that produces daily, weekly, monthly and yearly graphs of the DNS server's activity (queries, errors, etc.).

WML (Website META Language) is a free and extensible Webdesigner's off-line HTML generation toolkit for Unix. WML consists of a control frontend driving up to nine backends in a sequential pass-oriented filtering scheme. Each backend provides one particular core language. For maximum power WML additionally ships with a well-suited set of include files which provide higher-level features build on top of the backends core languages. While not trivial and idiot proof WML provides most of the core features real hackers always wanted for HTML generation.

Pngcrush is an optimizer for PNG (Portable Network Graphics) files. Its main purpose is to reduce the size of the PNG IDAT data stream by trying various compression levels and PNG filter methods. It also can be used to remove unwanted ancillary chunks, or to add certain chunks including gAMA, tRNS, and textual chunks.

Parrot is a bytecode-based virtual machine designed for dynamic languages. Parrot hosts a variety of language implementations, including Tcl, Javascript, Ruby, Lua, Scheme, PHP, Python, Perl 6, and a .NET bytecode translator.

The fcheck utility is an IDS (Intrusion Detection System) which can be used to monitor changes to any given filesystem.