Gaussview is software for building molecules and setting up Gaussian jobs.

A library for handling the WGDOS and RLE compression schemes used in UM files.

EarthScultor is a tool for designing and painting heightmaps, useful in art projects, geographic visualization and game development

A swiss-army knife for converting documents between different markup formats (e.g. docx, LaTeX, HTML, markdown, mediawiki - see http://pandoc.org/ for the full list)

Lets you convert any printable document to a PDF, via a virtual PDF printer driver.

Free software that can be used to write DVDs and CDs, and also create iso image files.

Open-source software that lets you split, merge and rotate PDF files

 

Terminal software for Windows that provides a range of capabilities, including ssh client and X Windows server which can be used to connect to Linux computers and remotely display graphical programs running on the remote computer.

WinDirStat is a free, open-source disk usage analyzer and cleanup software for Microsoft Windows