Sublime Text - Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.
Beyond Compare - Beyond Compare allows you to compare files and folders.
Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Eclipse IoT - Eclipse IoT provides the technology needed to build IoT Devices, Gateways, and Cloud Platforms.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.