In Infographic: What Tools Developers Actually Use (ReadWriteWeb, December 9, 2011), David Strom wrote:
The folks at BestVendor.com interviewed 500 developers and compiled this profile of the tools that they actually use. A few stalwarts predominate, such as Git, Eclipse, AWS, Dropbox, MySQL, and Google Analytics. But there were a few surprises too, including 23% using Notepad++ as their text editor and 8% using Heroku to host their apps. Many of the categories are wide open. All of those surveyed are from companies of less than 100 people from around the world.
There seems to be little love for Microsoft development platform for small shops.