I have listed out some of the best advertising programs that will help you make money online. I will update this page whenever I find more Advertising programs. So stumble this page and check back often to make money online.

• Google AdSense: AdSense is a contextual advertising program for which publishers simply have to add a piece of code to their sites that helps Google analyze what your page is about so they can serve Ads on that topic. AdSense also allows you to earn money by using Google Search on your site that will display relevant Ads when visitors search on your site. AdSense also has a referral program that allows you to earn by recommending various products like Firefox toolbar, AdSense, Adwords, etc.
• Text Link Ads: Text Link Ads will help you sell simple text links on your site easily. The monthly link price will depend on factors like your Google Pagerank and Alexa rank. As a new Advertiser on Text Link Ads you are eligible for $100 in FREE Links.Text Link Ads has an affiliate program that will pay you $25 for any referred visitor that is accepted into their publisher program and installs the advertising script on their site for seven days. If you refer an advertiser who purchases an advertisement, the referral will appear in your affiliate account within 24 hours.For more info, read my Text Link Ads Review.
• Chitika eMiniMalls: Chitika eMiniMalls is a cost per click advertising program that will perform particularly well for product related sites.
• Tribal Fusion: Tribal Fusion’s payment is calculated based on ad impressions (CPM). So the higher your web site traffic is the more money you will earn. To get accepted though you will need a minimum of 2000 unique visitors per day.
• Vizu Answers: Vizu Answers helps you earn money from your site by placing interactive Polls on desired topics. They pay you based on CPM (Cost per thousand impressions), and you even get to set the minimum CPM rate for each poll you put up on your web site.
• ReviewMe: Pays you to review products and services on your site. You control what you review.
• Kontera: Kontera’s ContentLink provides in-text advertising solution that monetizes your content in real-time, enabling an incremental increase in ad revenue by providing a new source of untapped ad inventory that does not compete with the other ad programs running on the site. ContentLink also creates a valuable user experience by serving relevant and informational ads that match the user’s interest and frame of mind.ContentLink requires your site to have a minimum of 500,000 pageview per month, but I have seen them accepting new sites with lower pageviews.
• : FAN adds CPM ads to your feed. You may need around 500 RSS readers to get accepted.
• Software Judge: They will pay you up to $50 to review software.
• Vibrant Media: You can sign up with them to display relevant in-text ads if your web site delivers more than 500,000 page views of text based content a month.
• - Displays ads that are relevant to the content of your site. They are CPC based just like AdSense.
• Pay Per Post - Write about web sites, products, services, and companies and earn cash for providing your opinion and valuable feedback to advertisers.
• BlogAds - BlogAds lets you set the price and helps you find advertisers for your blog easily.To perform better with BlogAds, place it at a more prominent position on your blog.

Also check out the guide for new bloggers to make money online.