Serna Enterprise for Mac OS X
Serna Enterprise is a powerful and easy-to-use WYSIWYG XML editor for collaborative authoring of structured documents. Full DITA support. C++ and Python API available for extension and integration. Available for Windows, Linux, MacOsX, SunSolaris.
Komodo Edit (Mac OS X/Intel)
Tree and text based xml editor. You can validate the XML against a schema or DTD. Support for XSL tranformations and XPath. The included text editor is usefull for editing plain text files (shell scripts, ini and config files, etcetera).
Add and edits meta-data in JPEG/RAW/TIFF files. Photos can be geocoded with latitude and longitude data from GPS (gpx or NMEA) files, as well as descriptions and summary text.
AVCWare Video Editor for Mac
Featured with intuitive interface and easy navigation buttons, you can cut video clips, split video segments and merge different video files together, and then export to High Definition videos and standard videos in excellent quality.
Komodo IDE (Mac OS X/Intel)
Wavepad Free Audio Editor for Mac
WavePad is music editing program for the Mac OS. WavePad allows you to create and edit voice, music and other sound recordings. You can duplicate sections of recordings and add echo, amplification, noise reduction and other effects.