Dev-C++ is a free, open source, lightweight C++ IDE for Windows complete with a multi-window editor, syntax highlighting, debugging capabilities, and more.
Home page:
http://www.bloodshed.net/devcpp.html
The project is also hosted at sourceforge.net.
VBScript is a great language to quickly accomplish Microsoft-specific tasks in a Windows environment. From managing local or network security groups to automating account modifications in Active Directory the Visual Basic scripting language can do it all.
http://www.activexperts.com/activmonitor/windowsmanagement/scripts/
http://www.microsoft.com/technet/scriptcenter/scripts/ad/users/default.mspx
http://techtasks.com/code/listlangs
http://www.w3schools.com/vbscript/vbscript_ref_functions.asp
Like the name suggests, Open Perl IDE is an open source, free Perl integrated development environment for Windows.