Here are a few of my suggestions....
Classifieds....None. Those tools are becoming very ineffective, but if you insist on using one I would go with the Ki Autoposter for Kijiji.com
Forums..NEVER with a capitol N How can you ever build relationships or answer peoples questions with a robot.....you can't
Twitter. Now here you have a ton of options.
Tweetadder.com This software is LOADED with goodies. But Can be expensive for starters.
Tweetwhistle.com Loaded again...but much cheaper.
Video: You will have to create the video yourself but these will help you distribute them.
TubeMogul.com - This is a free software that will let you upload your Video to Around 10 sites (Says 20 But. I have never gotten out to that many...depends on your niche.
TrafficGeyser.com THis is where the Rubber Hits the road with Video Marketing...I don't use it but friends have had incredible results. (I don't shoot enough video for $100 a month extra cost)
Hope that Helps with you quest for automation.