CPA (pay per sale/lead generation), and CPC (pa-per-click) advertising network. CPC offers are initially restricted and offered only to affiliates who have proven conversions through CPA placement.
By generating referrals, you earn a 2-tier 5% commission, as well as a bounty of $2.00/referral.
Sites must have a minimum of 2,000 unique visitors per day. Only accept sites from the USA or Canada. Payments are made NET60 with $50 minimum.

BeFree

Dozens of well known, but often unreliable merchants.
Pay per lead and pay per sale models.
Checks are issued by merchants, not BeFree network.

ClickBank

Credit card processing company and affiliate network with several thousands of merchants selling info-products.

ClickXchange

About 5,000 of CPA, CPL, CPC and CPM offers. Many of their advertisers are guys with several bucks, so be wary.
Checks are paid monthly with no minimum.
5% commission on the earnings of every webmaster you refer, plus $10.00 for each referred advertiser.

clixGalore

Reliable Australian affiliate network comprising of over 1000+ merchants and ten of thousands of affiliates. CPA and CPC models.
ClixGalore has a monthly pay schedule and will mail you a check when your commission reaches US$50 or AUD$100 or UKЈ35 or Ђ60.
No special requirements.

Commission Junction

Very reliable and friendly network both for affiliates and merchants. So it is not surprise that CJ is the largest affiliate network having about 2000 of merchants and 130,000 affiliates. Thousands of pay per lead and pay per sale offers.

Commissions earned from all merchants are pooled together in one check.
Minimum monthly payout is $25.00.
$2 for every referred webmaster.
No special requirements.
Recommended.

Cyberbounty

Small CPA network. All their offers combined into freebiestuff.com.
3 Tier referral program: refer webmaster and earn 5% on their revenue and 3% on their referrals.
Minimum payment: $50.00. Pays Net 60 (60 days after the end of the month). Minimum of 750 unique visitors per day.

Direct Response

Quality affiliate network offering a wide variety of lead and click campaigns to choose from for your website or newsletters.

Great affiliate support, including a banner rotation and real time tracking.
Consolidated checks with $20 minimum are send 60 days after the close of the month.
Make 10% of all commissions earned by webmasters you refer.
Sites shall be written in English and receive a minimum of 3,000 unique page views per month.

FineClicks

Recently acquired by ShareSale. Reputable company having pay per click, lead, sale, and CPM popup/under offers. CPC and popup campaigns are offered only to affiliates who have proven conversions through CPA placement.

$50.00 minimum payment. Affiliates are paid monthly, within 45 days of the end of month.

You can earn $5 for each referred affiliate that earns $5 himself, plus 5% of all revenue that your referred websites earn.
Recommended.

iCommissions

Originated in 1997 as an internet-based web affiliate program for the website iSubmitter.com, have grown to fourteen pay per lead affiliate programs in the Financial Services and Internet Business Solutions arenas.

$2.50 plus a 15% commission on the earnings of your webmaster referrals.
Commissions are combined into one monthly check.

LeadCrunch

Quality pay per lead affiliate network with many high-yielding offers. You can run banners, buttons, text ads, advertorials, pop-ups, integrated sign up forms and more. Banner rotator is available.

Two tier: 5% of referred webmasters earnings.
Minimum payout is $25.00. Pays 60 days after month-end.

Leadhound

Pay per lead affiliate network with about 200 merchants. Pay affiliates on the 15th of each month for the previous months activity.

$5 one-time bonus for each new affiliate you recruit to join Leadhound. Bonus paid when new affiliate reaches $50 in commissions due. 5% monthly residual from affiliate earnings.

Commission payments are paid in US Dollars, Euro, Japanese Yen, or UK Pounds only via PayPal.

Claim that all merchants place a deposit so you receive commission payments in a timely manner. Restrictions to many countries.

LinkShare

LinkShare is a reliable provider of over 500 pay per sale and pay per lead affiliate programs. Earnings depends on which merchants you promote.

Doesn't pay aggregated revenues but now LinkShare requires merchants to pay no later than 35 after the end-of-month. Minimum payout is $10.00 - 50.00 with most merchants.
$1.5 for every referred webmaster. No special requirements.

OnResponse (formerly Bach Systems)

Quality network owned by ValueClick. Excellent reporting. You can promote their offers separately, or as a whole by linking to FreebieClub.com site. All offers can also be carried on mailing lists.

Referring new affiliates pays 10% of their monthly earnings.
Minimum payment: $50.00. Minimum 100 hits per day.

Performics (formerly Dynamic Trade)

Pay per sale network. On Performics' list of clients are some of the world's foremost brand names: Discover Card, Eddie Bauer, Orvis, Hammacher Schlemmer, Spiegel and more.
Only for well-branded high-traffic sites.

ShareASale

Quality affiliate network that lists over 800 medium-size merchants. Pay per lead, sale, and pay per click models.

Commissions from various offers are combined into one check with a $25.00 monthly minimum.

Payments are mailed out on the 20th day of the month. PayPal option is also available.

$1.00 for every qualified affiliate referral.
No special requirements.
Recommended.

TradeDoubler

Sweden-based provider of affiliate programs. Also operates in Austria, Denmark, Finland, France, Germany, Ireland, Italy, Netherlands, Norway, Spain, and U.K. Each country office is operated as a TradeDoubler subsidiary with its own website and affiliate network.
Over 300 merchants. Pay per lead / sale and pay per click models.

Payments are made every two months. Payments and affiliate's approval depend on a merchant. Ј2 for recruiting a new affiliate.

WebSponsors

Currently carries about 150 offers. All offers are regularly updated on the Free2Try.com website, which is personalized for each affiliate.
Pays also for referring affiliates: 10% of their monthly earnings.
Minimum payment: $15.00. Minimum 100 unique visits a day. USA sites only.