ILSpy is a free and open-source .NET assembly browser and decompression tool that is pretty popular in the C# development field, developed by ICSharpCode (i.e. the development team of SharpDevelop). It has the user interface, layout, and decompilation functions similar to Red Gate Software's .NET Reflector. Moreover, sometimes for some assemblies that can not be decompiled with .NET Reflector (because of encryption), it's still possible to do that using ILSpy. Simply speaking, it has only one purpose - to finally completely replace .NET Reflector and do better.

If you are a newcomer who wants to modify the APK installation file for Android OS, but doesn't even know how to decompile an APK/JAR file, or has no Java programming experience, then APK Editor this APK file editor running on Android smartphone may be exactly an edge tool that you expect.

Restorator (AKA: Restorator 2007) is a professional and easy-to-use executable file resource editing and software localization tool from Germany, comes with intuitive user interface, as well as complete tutorials, examples and prompts. Its working principle is similar to eXeScope, Resource Hacker or XN Resource Editor, but it's far more better then all of them in terms of convenience and functionality.

Decompiler and disassembler are essential tools for any sharp-sighted programmers. No matter which programming languages, they have their corresponding decompilers. For compiled Java binary class file, there are two excellent decompilers: they are freeware Java Decompiler and commercial software DJ Java Decompiler (AppNee will release its related resources later).

Hopper is a very famous and popular reverse engineering tool for both Mac and Linux platforms, mainly used to decompile and debug any 32-bit and 64-bit executable (binary file) on Intel Mac, Linux, Windows and iOS.