Valentina is a pattern drafting software tool for small-batch and custom-sized clothing manufacturing.

PDL gives standard perl the ability to COMPACTLY store and SPEEDILY manipulate the large N-dimensional data arrays which are the bread and butter of scientific computing. The idea is to turn perl in to a free, array-oriented, numerical language in the same sense as commercial packages like IDL and MatLab. One can write simple perl expressions to manipulate entire numerical arrays all at once. For example, using PDL the perl variable $a can hold a 1024x1024 floating point image, it only takes 4Mb of memory to store it and expressions like $a=sqrt($a)+2 would manipulate the whole image in a few seconds.

Sup is a console-based email client for people with a lot of email. It supports tagging, very fast full-text search, automatic contact-list management, custom code insertion via a hook system, and more. If you're the type of person who treats email as an extension of your long-term memory, Sup is for you.

perlbrew is a program to automate the building and installation of perl in the users HOME. At the moment, it installs everything to ~/perl5/perlbrew, and requires you to tweak your PATH by including a bashrc/cshrc file it provides, in your shell configuration file. You then can benefit from not having to run 'sudo' commands to install cpan modules because those are installed inside your HOME too. It's a completely separate perl environment.

Bayesian inference of phylogeny is based upon a quantity called the posterior probability distribution of trees, which is the probability of a tree conditioned on the observations. The conditioning is accomplished using Bayes's theorem. The posterior probability distribution of trees is impossible to calculate analytically; instead, MrBayes uses a simulation technique called Markov chain Monte Carlo (or MCMC) to approximate the posterior probabilities of trees.