PEiD (short for PE iDentifier) is a well-known professional packer/cryptor/compiler detecting tool. It's so powerful that it can detect the types/signatures of almost any PE file packing tools (at present, the number has been more than 600 kinds). In addition to the official version, AppNee also provides you its full-plugin version, which can be treated as the most perfect one version (contains 60+ plugins and necessary runtime library files: mfc70.dll, msvcr70.dll, rtl70.bpl, vcl70.bpl) on the Internet at present. I do believe reverse engineers or software cracking/unpacking enthusiasts must like it very much.
CHM (Microsoft Compiled HTML Help) is a convenient document format suitable for quick browse and query, which is very common in all kinds of help documentations. In particular, its production process does not become complicated because of its powerful features; on the contrary, that's as simple as reading it. So, all we need is just a professional CHM making tool.
Bat To Exe Converter is a simply designed but very professional batch file compiler that can convert BAT (.bat)/CMD (.cmd) script files to the executable (.exe) format. Not only can this prevent others from casually changing the batch program you wrote, will also makes it look more beautiful and professional.
For beginners using Windows who are interested in the C/C++ language (anyway, you need to compile your C/C++ programs) or Linux embedded system development, the big headache is switching back and forth between Windows & Linux. Even you have to continuously reboot system in order to achieve the purpose, very troublesome. Cygwin just solved this problem.
Resource Hacker (formerly as ResHacker or ResHack) is a lightweight free app similar to eXeScope, used to decompile/recompile, view, modify, add and remove the resources (icon, bitmap, cursor, menus, dialog, string table, message table, accelerator, Delphi form and version information...) in both 32-bit & 64-bit Windows executable programs and other related files (*. EXE, *. DLL, *. CPL, *. OCX).