PhotoFlare - Quick, simple but powerful Cross Platform image editor.
Altova XMLSpy - The XMLSpy XML Editor is a powerful tool for editing XML and related technologies. It is the only XML Editor with patented SmartFix validation, enterprise-grade editors, converters, debuggers, and code generators.
showFoto - ShowFoto is the standalone image editor of the digiKam project.
Oxygen XML Editor - Oxygen XML Editor provides a comprehensive suite of XML authoring and development tools.
PhotoDemon - Lightweight portable BSD licensed photo editor for Windows focused on performance and usability.
Liquid Studio - XML Tools Provider: XML Studio - Graphical XML Schema Editor.