DuMP3 is a duplicate and similar file finder. It finds exact duplicate binaries by hash, similar text files by substring content, images (JPG, BMP, GIF, PNG, etc) by color and audio files (MP3, WAV, OGG, etc) by wave data. Future: fonts, video.
A webbased XML development toolkit to edit, validate and preview XML files. This program gives you a structured view of the XML data.
It has support for multiple XML formats: SVG, DocBook, XHTML and more. phpXIedit is written in PHP.
dxflib is an opensource C++ library for reading and writing AutoCAD (R) DXF files. It provides the functionality to read and write many basic entities as well as information about layers and blocks. From the author of QCAD.