a free source code editor which supports several programming languages running under the MS Windows environment. based on Scintilla edit component (a very powerful editor component)
a development tool to help programmers adheres to a coding standard. It automates the process of checking code to spare humans of this boring (but important) task.
Win32-versions of GNU tools, or tools with a similar open source licence. The ports are native ports, that is they rely only on libraries provided with any 32-bits MS-Windows operating system, such as MS-Windows 95 / 98 / 2000 / NT / XP
a free, open-source password manager or safe which helps you to manage your passwords in a secure way. You can put all your passwords in one database, which is locked with one master key or a key-disk. (there is also a freakish .net version)
open-source, cross platform IDE for the C/C++ programming languages (build and tested on Windows XP SP3, (K)Ubuntu 8.04, and Mac OSX 10.5.2). CodeLite is distributed under the terms of the GPL license.