Affiliate Software

• Directtrack.com
• Cakemarketing.com
• Hitpath.com
• Linktrust.com

Affiliate Networks

• Cj.com
• Google Affiliate Network
• Linkshare.com
• Clickbooth.com
• Adknowledge.com

Email Service Providers

• ExactTarget
• Bronto
• Aweber
• Mailchimp
• Campaign Monitor

Affiliate Conferences

• Affiliate Summit
• CJU
• PubCon
• LeadsCon
• SMX

Paid Competitive Research tools

• Compete.com
• Hitwise.com
• Keyword Spy
• SpyFu
• Trellian Competitive Intelligence

Pay-Per Click Bid Management

• PPC Bid Max
• Keyword Max

Other Tools

• Google traffic estimator
• Google Adwords keyword List generator

Blogs

• Seomoz.com
• SEOBook.com