Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.