Onyx-VJ is an Adobe AIR application, a useful video performance tool. It is based on ActionScript 3 language. Onyx-VJ is capable of handling five videos simultaneously and will let you add various filters to have the audio and video act in sync.
Onyx-VJ Features:
1. Mix up to 5 layers of video ( FLV, SWF ).
2. Extremely easy-to-use drag-n-drop interface.
3. Filters can be assigned to a tempo so that your videos respond to music.
4. Load and save .Mix files to keep your setup of layers, effects and filters
5. Powerful API to create custom filters, transitions, patches, plug-ins

Requirements:
* Adobe AIR

The license of this software is Freeware, you can free download and free use this video utility software.