Classified ads can be a good source of free advertising.

Search and you should find plenty. Remember though when you search don't put in classified ads, you have to try and think what your potential customer will search for. For instance if you are selling an affiliate program then you could try a search for work at home, earn online or something similar.

Here are a couple of places where you can post free ads. 

My Free Adboard

This is my ad board. I do promote it so feel free to post an ad or sign up for your own ad board. It's free

Click here to post your ad now  

Hits2U

Submit your ad here and get it posted free for 7 days.

Click here to post your free ad now