KaarPux is aimed at developers who want to build and explore a Linux distribution where they have complete control over the build process. The build process, as well as each package, are described in simple "YAML" files, which are then transformed into shell scripts used to build KaarPux.
ack is a tool like grep, optimized for programmers. Designed for programmers with large heterogeneous trees of source code, ack is written purely in portable Perl and takes advantage of the power of Perl's regular expressions. It searches entire trees by default while ignoring Subversion, Git, and other VCS directories and other files which aren't your source code. It uses Perl regular expressions to find just what you want.