Adbrite
http://www.adbrite.com/mb/index.php
Sell space on your site for text ads.
Amazon aStore
http://astore.amazon.com/
Easily create a store or shopping section on your site instead of sending your visitors to Amazon. Amazon handles the shopping cart and fulfillment.
How to search Amazon for Amazing Deals
http://www.brand-name-coupons.com
This link is essential for anyone searching for a deal. It compiles all the links necessary to flush out the best deals from Amazon.com
Amazon Seller
http://www.amazon.com/gp/seller/sell-your-stuff.html
Sell your stuff directly on Amazon
Amazon Affiliate Program
http://affiliate-program.amazon.com/
Using your existing site, sell anything you can find on Amazon
Associated Content
http://www.associatedcontent.com/
If you write a story, how-to, rant, etc. you can submit it to them and they will pay you $3-$20 per article if they like it
Azoogleads
http://www.azoogleads.com/az/new/login.php
Another ad program. They do have some decent companies lined up as advertisers. You provide space, they'll provide an ad.
BidVertiser
http://www.bidvertiser.com/
PPC (pay per click) program with a low $10 payout amount.
Bravenet
http://www.bravenet.com/webtools/affiliate/index.php
These guys offer a ton of services for webmasters and blog owners. They pay you $1 for each person you send over.
Blish
http://www.blish.com/
Whether you're a company with thousands of digital (downloadable) products, or you've written an ebook or some code, Blish offers you a place to sell that content.
Blog
http://www.problogger.net/
Start a blog and consistently write excellent content. With good ad placement, you may make some money.
Business Opportunities Blog
http://www.business-opportunities.biz/
Ideas posted nearly every day that could result in making money. A lot of the ideas pertain to online businesses. If you are an aspiring entrepreneur, this is a great reference.
CafePress
http://www.cafepress.com/cp/info/sell/makemoney/
You provide a design, they'll toss it on a T-Shirt, Hat, etc. No upfront costs. Get a free online shop and promote your products on your website.
Chitika
https://chitika.com/
Their eMiniMalls service has shown great results for many Bloggers and site owners. You choose a keyword and they show relevant products on your site using a pretty unique interface.
Clickbank
http://www.clickbank.com/promote_products.html
Another Affiliate Program site with 10,000+ products to advertise
ClicknWork
http://www.clicknwork.com/
Get paid $5-$150 per hour for basically doing freelance work on a per-assignment basis. You have to pass a pretty tough test to get in.
Clicksor
http://www.clicksor.com/affiliate_programs.php
These are the guys that generate contextual ads on sites that show up when you hover over a double-underlined word.
Commission Junction
http://www.cj.com/
If you have a site, you can join Commission Junction. Once enrolled for free, you can choose companies whose ads are pertinent to your site. Companies have the ultimate say on working with you. Their are easily over 1,000 companies to choose from here.
CreamAid
http://www.creamaid.com/
For blogs only, advertisers provide you with a topic and you write about it on your site. To do this, you have to install a flash widget into your blog post. The more people you bring into the conversation through the widget, the more you get paid.
Eefoof
http://www.eefoof.com/
Think of it as YouTube + Flickr + Music. You add original content and they pay you based on the visitors you attract.
Ether
http://www.ether.com/default.aspx
If you are an expert on something, Ether provides a way for people to pay you to talk about it in a one-on-one setting. If you want to charge $250/hr, that's fine. You have to do all the advertising so you should have a blog or site already established.
eBay
http://www.eBay.com/
Said to be the largest fleamarket in the world.
eBay Stores
http://stores.eBay.com/
If you have a real store and want to sell your stuff online, this is a decent option to get you started.
ELance
http://www.elance.com/
Name gives it away. Programmers, Codes, Web Designers, Writers, Editors, can look for freelance opportunities.
Feedvertising
http://www.text-link-ads.com/feedvertising/
This is an arm of Text Link Ads and is currently only good for WordPress 2.0 Users.
Feedburner
http://www.feedburner.com/
Not only are they the best place to house your feeds, they will also add ads to your feed. You get paid per impression and click.
Google Adsense
https://www.google.com/adsense/
Google displays relevant ads based on your site's content. You get paid when people click through to the advertised sites.
Google Adwords
https://adwords.google.com/
Create simple text ads and choose keywords that determine when they are displayed. This is where the Adsense Content comes from. You do not need a site for this.
Google Answers
http://answers.google.com/answers/
If you are good, Google will pay you to answer questions in your specialty. Questions all come from normal people like you and me. You can get paid $2.50+ per answer you provide.
H3.com
https://www.h3.com/howItWorks.html
Get paid to fill jobs. Commissions range from $50-$5,000. It all depends on how tough the job is to fill and how desperate the hiring company is.
Indeed.com
https://ads.indeed.com/
Add their job board to your site. They then post jobs based on the geographic location of visitors and the position types you pre-select.
InnerSell
http://www.innersell.com/
If you have a customer that wants to buy something you cannot sell, you can sell the lead here.
Jellyfish
http://www.jellyfish.com/referAFriend
This is a shopping site that pays you a percentage of the purchases made by people you refer. They are not part of a wider affiliate program so you do it direct.
Jigsaw
http://www.jigsaw.com/
It's a pretty flaky model but if you have a Rolodex full of good contacts, you can sell them here.
KarmaOne
http://www.karmaone.org/HowItWorks.php
They are basically a recruiting website. If you fill one of their jobs by finding a good candidate, you'll get paid anywhere from $50-$12,000. It all depends on how desperate the hiring company is.
Linkshare
http://www.linkshare.com/
If you have a site, you can join Linkshare. Once enrolled for free, you can choose companies whose ads are pertinent to your site. Companies have the ultimate say on working with you. Like Commission Junction, there are a ton of companies waiting to evaluate your site.
Main Street Mall Online
http://mainstreetmallonline.com/
Affordable flate rate store rental to list and sell as much as you want. No listing fees. No final sales commisions.
Microsoft Adcenter
https://adcenter.microsoft.com/Default.aspx
Bid on keywords and Microsoft places your created ads then they are searched for. This is similar to Google Adwords. You do not need a site for this.
Overstock.com
https://auctions.overstock.com/
Sell your stuff here.
Pageflakes
http://www.pageflakes.com/affiliateprogram.html
This is a company that developed a user-defined Ajax homepage to show feeds, flickr photos, and a ton of other things. Think of it as a replacement for your Google Homepage. Anyway - they'll pay you $1 per referral that you send over. They are not part of a wider affiliate program so you do it direct. This one is pretty simple.
Pay Per Post
http://payperpost.com/
They have advertisers that will pay you to write about their products on your blog.
Pheedo
http://pheedo.com/
If you have an RSS feed, run it through Pheedo. Like Feedburner, they can include ads into your feed and if you really become large, advertisers will pay a premium for you to show their ads.
Shareasale
http://www.shareasale.com/
Similar to Commission Junction and Linkshare however they seem to have lower tiered companies with advertising offers.
Shoemoney
http://www.shoemoney.com/
This is a blog that can teach you a ton on making money online. Worth the hours spent to read his old stuff.
Software Judge
http://www.softwarejudge.com/
They will pay you up to $50 to review software.
Text Link Ads
http://www.text-link-ads.com/
You can earn by sending advertisers to them or by selling spots on your site. You must have own domain, websitem or blog to do this; nothing on a shared domain, i.e. /blogspot.
Vibrant Media
http://www.vibrantmedia.com/webpublishers/index.asp
Only for sites that have 500,000 page views of text based content a month but, if you have that much traffic, these are the guys that display bubble box ads to underlined words on your site.
West Work At Home Agent
http://www.workathomeagent.com/default.asp
Not entirely online but this is worth a mention because it has won awards and is legitimate. If you are an at-home Mom or free-lancer without work, you might want to check this out.
Yahoo Publisher Networkhttp://publisher.yahoo.com/
This is the Yahoo version of what Google calls Adsense.