Below are free web advertising resources that I have tried. I was going to compile a long list of such resources, along with my testing statistics but I since found a company that already provides a comprehensive ad testing service:Click here to learn more about this excellent advertising directory resource.
Free Traffic Bar - This superior alternative to the problem-plagued "Instant Buzz" traffic bar has recently become even more valuable. The owner has added several new features and innovative ways to advertise with Free Traffic Bar.
Testing Results: Good
Special Offer: If you click the preceding link or the image below and decide to join as a free or pro member, you will receive 1000 free ads:
USFreeAds - Provides free classified ads for a large number of different products and services. Has a business opportunities section. You can place ads free as the name implies.
Testing Results: Poor (even with the paid option)
Solo-Ads.com - Submit Solo Ads to other members.
Test Results: Fair