Attached Link: http://www.digidesign.com/

Digidesign has free ProTools LE available for both mac and pc. this is a limited version of their full featured version, however it has LOTS of power. audio editing, plugins, midi tracking. You may not be interested in all the features, but the price is reasonable. FREE. www.ulead.com has has a full range of inexpensive video editing production software ranging from $60-500 depending on the features and level you need. Ulead provides working trial versions of their software so you can see if you like it before dumping a bunch of money.