POEdit - Editing tool for gettext localization framework. Available for Linux and Windows. - http://www.poedit.net/
Resource Hacker - Utility to view, modify, rename, add, delete and extract resources in 32bit Windows executables and resource files (*.res). - http://www.angusj.com/resourcehacker/
Enlaso Localization Tools - Windows tools to extract translatable content to various translation environments. XML-related utilities for encoding conversion and external reference update. - http://www.translate.com/technology/tools/
Translate.sourceforge.net - Open source toolkit to convert between different open source translation formats. - http://translate.sourceforge.net/
Ini Translator - Utility to translate ini-style language files. Windows 98/Me/XP/2000. - http://initranslator.sourceforge.net/