Software I like & use
User-friendly LaTeX editor for Linux, Mac and Windows.
Very capable integrated development environment (IDE) for C++ and
drag'n'drop graphical user interfaces.
An integrated modeling environment for agent-based modeling. I use it form
small projects and quick prototype models. Also for non-agent models.
My favorite IDE for R.
Proprietary literature management software. It has a nice interface, tries
to automatically gather bibliographic informations, stores a separate Bib TeX
file per folder (i.e. project) and syncs everything to the cloud.
My own file hosting, Firefox sync, collaborative (with my wife) calendar and task
sync and feed reader.
I'm feeling lucky ;-)