AudioBoxBaby is an application that detects the tempo of music in real-time and outputs this information via MIDI to control VJ software.

This small but very useful app allows to build buttons, switches and faders in an easy manner. You can assign thumbs of the triggered clips to the buttons, name everything propper, write small mini scipts with fade and wait between the steps.
This makes life easier in some late night times, so it also may be used for people who just lost the ability to think straight and are forced to continue perfomance.
The best thing is the ability to build different patches with different pictures on the buttons. I don`t think this needs to be explained any further, the app just speaks for itself.

This program lets you use any wacom compatible tablet as a midi controller, which can be used with most VJing software, as well audio and other software.
For midi tab to be useful for software you must use a program like midiyoke or maple midi (will write review later) so you can route the midi out of midi tab to another piece of software. i have writen a guide on how to do posted here on vjcentral.

JunXion is a very useful tool that allows any USB game controller to be used as a Midi control device. It supports up to eight devices and also allows Keyboard and mouse to be used as midi controllers if you don't already have a tool for that.
The real beauty of this is the possiblitys for all the oddball game controllers that can now be used for VJ purposes, eg what about using a P5 glove for VJ'ing? (http://www.essentialreality.com/p5_glove.asp)

MidiOX is an absolutely essential app for anyone using midi in there VJing setup. It allows full windows scripting host control of MIDI, full midi mapping and I/O port monitoring.
It can filter and convert midi data on the fly and has full logging capabilities. It also includes a virtual keyboard for generating midi without the need for an external midi device.

Midiyoke is a virtual midi patch cable driver that allow routing of midi data in and out of all your midi capable applications and external midi devices.