Additionally, you will have access to a base of potential affiliates that often have more confidence in third party monitoring.

First three listed are the biggest affiliate networks for well established businesses.

BeFree

Their tracking system are used by dozens of well known merchants. However for affiliates many of these merchants are better known for their fraudulent activity.

Set up fee: around $6000.
Initial (escrow) deposit: n/a.
Transaction fee: 2-3% with a minimum charge of $3000 monthly.

Commission Junction

The largest and very friendly network both for affiliates and merchants. Excellent reporting. Very attractive feature for affiliates is that commissions earned from all merchants are pooled together in one check.

Set up fee: $2250 and $250 yearly fee.
Initial deposit: $3000.
Transaction fee: 30% or $0.30 with a minimum charge of $500 monthly.
Recommended.

LinkShare

Another major affiliate network. Became more attractive for affiliates, because now requires merchants to pay no later than 35 after the end-of-month.

Set up fee: $10,000 and $2000 yearly fee.
Initial deposit: n/a.
Transaction fee: 2-3% with a minimum charge of $2000 monthly.

Below are listed smaller and more affordable affiliate networks for smaller merchants.

Affiliate Fuel

Does not run any rev-share (pay-per-sale) campaigns. In addition to pay-per-lead campaigns, also delivers CPM direct email, newsletter and CPC campaigns.

Set up fee: Free.
Initial deposit: $2500 minimum. All undelivered funds in an advertiser's account will be fully refundable.
Transaction fee: 30%.

ClickBank

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

Set up fee: $49.95.
Initial deposit: n/a.
Transaction fee: $1 + 7.5% fee per sale.

ClickXchange

Large pool of cheap merchants.

Set up fee: Free.
Initial deposit: $500.
Transaction fee: 30% with a minimum charge of $42 monthly.