Updated Feb 24/2017
Canon Powered Mics
Canon DM-100 Directional Stereo Microphone - $199 -
The Canon DM-100 Directional Stereo Microphone delivers high-quality stereo audio recordings to various Vixia-series camcorders. The microphone connects via Canon's powered advanced accessory shoe for cable-free installation - both power and sound is carried, so no messy cables sticking out the side, and no running out of battery power on the mic, which is nice. Sound quality is good - not as good as a Rode Video Mic Pro or Shure VP83, but certainly better than the built-in mic, and produces respectable sound.
NOTE - will only work on Canon video cameras with the Advanced Accessory Shoe. Will not work on any other camera. Includes furry windsock.
Find Sony powered mics for Sony cameras here.
Battery Powered Mics
These mics connect via mini-jack or XLR cables and are powered by battery.
Find Rode Mini-jack mics here
Find Shure Mini-jack mics here
Find Rode XLR mics here
Find Sennheiser XLR mics here