Widget Baiting is sort of a free content generator. Here is a quote from their site:
Define: widgetbaiting
Widget Baiting is to construct content with the aim of luring search engine spiders to your widget pages, on your widget site enabling a quality of content to be indexed that if written manually would not deliver a meaningful [...]

DigitalPoint Coop is a free advertising network. You add some code on your pages and text links from other sites in the network are displayed. You also add your text links which will be displayed in the network.
It’s useful because you can get lots of one way links this way or a couple clicks. It’s [...]

Traffic Equalizer is a popular content generator. You most probably have seen pages generated by Traffic Equalizer already but didn’t know what it was. What I don’t like about it is that the majority of the pages generated by it, look just plain ugly. You can do things to improve the looks but if you [...]

NicheBot is an awesome keyword tool and it’s totally free. I have been using it lately and it’s proven great help to grow your keyword lists or refine them for optimal results.
So you type your keyword/s in it’s search box and you choose one of the features.
1. Wordtracker Keywords - Let’s you see the top [...]

I came upon some cloaking fora (yup, it’s not “forums”) recently, so I though I’d share them. Here it goes:
http://cloakingforums.com/ (from SEC)
http://www.webmasterworld.com/forum24/
http://p073.ezboard.com/bkloakitdiscussion (from KloakIt)
A good read on cloaking for newbies: http://www.spiderhunter.com
Cloaking FAQ by Fantomaster: http://fantomaster.com/fafaqcloak1.html
Fantomaster resources: http://fantomaster.com/fasmbres0.html