Codefield - Tools for developers, designers and photographers
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
ConEmu - ConEmu-Maximus5 is a full-featured local terminal for Windows devs, admins and users. Get better console window with tabs, splits, Quake style, copy+paste, DosBox and PuTTY integration, and much more.
GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
Cygwin - Cygwin is a set of tools that provide Linux and POSIX functionality to Windows.