What is the best (so far) application for doing a certain job? What do applications do?

Whilst looking around for software and functionality I have often been less than happy with many software due to lack of basic documentation, specifically what does it do and how. All software in the list either provides good documentation or I have written some and it is included here.

To ensure that all software is available I have a local copy. This probably is not going to be the most recent and you should refer to the link or search for it it is has moved before resorting to my local copy.