TortoiseSVN - The coolest interface to (Sub)version control
Sortd - Rated the #1 App for Gmail
VisualSVN - VisualSVN - Subversion plugin for Visual Studio
KanbanMail - A Kanban board for your emails.
Xversion - Super easy enterprise class version control.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.