Notepad++ is a free (as in "free speech" and also as in "free beer") source code editor and Notepad replacement that supports several languages.

Android Studio is the official Integrated Development Environment (IDE) for Android app development, based on IntelliJ IDEA . On top of IntelliJ's powerful code editor and developer tools, Android Studio offers even more features that enhance your productivity when building Android applications.

SharpDevelop is a free IDE for C# and VB.NET projects on Microsoft's .NET platform. Its features forms designer for C# and VB.NET, code completion for C# and VB.NET (including Ctrl+Space support), XML editing; folding, code auto insert (Alt+Ins), C# to VB.NET converter, as well as VB.NET to C# converter; completely written in C#; compile C# and VB.NET in the IDE out-of-the-box, open source, ILAsm and C++ backends, integrated NUnit support, assembly analyzer, and XML documentation preview. You can add new project or file types, or even compilers to SharpDevelop.

VS Code is a new type of tool that combines the simplicity of a code editor with what developers need for their core edit-build-debug cycle. Code provides comprehensive editing and debugging support, an extensibility model, and lightweight integration with existing tools.

The ISN AutoIt Studio is a complete IDE made with AutoIt, for AutoIt! It includes a GUI designer, a code editor (with syntax highlighting, auto complete & intellisense), a file viewer, a backup system, trophies and a lot more features!