Below is an outline of the affiliate marketing services and tools in the MarketingTerms.com digital marketing tools index.

Click on the link below each section for a page with more detail.

Affiliate Networks

CJ Affiliate – Large network. Many top e-retailers. Technology innovator.
Rakuten Marketing (formerly Linkshare) – One of the original major affiliate networks.
ShareASale – Thousands of merchants.
LinkConnector – Smaller network, but has some unique merchants, some strong niches.
Amazon.com Associates – Single-company program, but has a network-like selection of products.
eBay Partner Network – Single-company program, but has a network-like selection of products.
FlexOffers.com – 5,000+ affiliate programs.
Tradedoubler – 2,000+ affiliate advertisers.
Affiliate Window – 1,600+ affiliate advertisers.
Affiliate Future – Affiliate network based in the UK.
Webgains – Affiliate network based in the UK.
AvantLink – Country-specific networks for the United States, Canada and Australia.
Avangate –  Network for digital goods and services (22,000+ as of November 2015).
ClickBank – Seller of digital products created by entrepreneurs.
ValuLeads – (not many specifics available on the public website)
other
VigLink – Simply add one line of code to your site, and VigLink automatically turns existing links on your pages into revenue generating links.
Skimlinks – Get instant access to over 20,000 affiliate programs. Transform any normal product or merchant link into its equivalent affiliate link.

CPA Offer Affiliate Networks

Clickbooth – Large company with extensive “About Us” info.
MaxBounty – Offers various innovative incentive promotions.
PeerFly – 2,000+ live offers.
AdWork Media – 2,500+ affiliate campaigns.
MUNDOmedia – Global digital advertising agency with affiliate offers.

Affiliate Tracking Software

Post Affiliate Pro – Downloadable licenses for one-time fee, or hosted option for monthly fees.
iDevAffiliate – Affiliate software (PHP / MySQL) available as an owned version or a leased version.
OSI Affiliate Software – Available for monthly fees, with no transaction fees. 15 day free trial.
directTrack – Affiliate software tracking platform, powers networks and in-house programs. Contact for pricing.

Affiliate Program Management Companies

AffiliateTraction – 59 current employees per LinkedIn as of 11/22/2015.
Schaaf-PartnerCentric – 32 current employees per LinkedIn as of 11/22/2015.
AffiliateManager.com – 17 current employees per LinkedIn as of 11/22/2015.
MGECOM – 11 current employees per LinkedIn as of 11/22/2015.
AMWSO – 15 current employees per LinkedIn as of 11/22/2015.
AM Navigator – 3 current employees per LinkedIn as of 11/22/2015.
Greg Hoffman Consulting – 2 current employees per LinkedIn as of 11/22/2015.

Forums & Hangouts

ABestWeb – Huge affiliate marketing forum with many sub-forums.
AffiliateFix – Large forum for affiliate marketing and related topics.
5 Star Affiliate Programs – Forum primarily for affiliate marketing. Rules encourage a positive, friendly attitude.
Digital Point Forums – Sub-forums for affiliate marketing, within a larger forum for internet marketing.
WickedFire – Has an affiliate marketing sub-forum. Seems to have more of a fast-cash focus.
Warrior Forum – Internet marketing forum and marketplace. Seems to have more of a fast-cash focus.

Miscellaneous

The PMA – Performance Marketing Association
Affpaying – Reviews of CPA networks, affiliate programs and ad networks

Podcasts

Affiliate Buzz – James Martell’s affiliate-focused podcast, since 2003.
Smart Passive Income – by Pat Flynn, not always affiliate, but relevant.
The Solopreneur Hour – the affiliate category of a more general podcast.
Affiliate ABCs – archived episodes with some still-relevant topics.

Blogs

Smart Passive Income – very open, easy-to-understand blog about online income.
AffiliateTip – by Shawn Collins, Co-Founder of the Affiliate Summit conference.
Sugarrae – infrequent, but can’t-miss. Old-school affiliate. No B.S.
Affiliate Stuff – an affiliate’s return after 3.5 years off. Well written.
CJ Affiliate – affiliate network blog with basic info for affiliates and merchants.
ShareASale – affiliate network blog with basic info for affiliates and merchants.
LinkConnector – affiliate network blog with basic info for affiliates and merchants.
Schaaf PartnerCentric – affiliate program mgt company, some general tips.
Genove Prussakov – affiliate program mgt company, tips specific to merchants.
Matthew Woodward – affiliate, publishes regular income reports and tips.
Adam Reimer – affiliate, covers some topics not seen everywhere else.
Shoemoney – affiliate, popular personality, unfiltered writing.
Zac Johnson – affiliate, blogging and podcasting.
John Chow – affiliate, known for aggressive monetization.
Charles Ngo –  affiliate.
Ian Fernando – affiliate.
Tricia Meyer – affiliate.
Missy Ward – affiliate.
Affilorama
Luke King – from PeerFly, a CPA network.
Performance Marketing Insider – performance marketing news.
AffBuzz.com – aggregator of more affiliate-related blogs.
AffPosts.com – aggregator of more affiliate-related blogs.

YouTube

AffiliateTip by Shawn Collins – short Q&A videos on common affiliate marketing topics.
Smart Passive Income by Pat Flynn – some videos specifically about affiliate marketing, others about related topics.

Courses

Udemy – Affiliate marketing courses (various).

Conferences

Affiliate Summit – major events, one yearly in east US and west US.
Rakuten Symposium US / Rakuten Symposium UK – one event each.
CJ University – yearly event in Santa Barbara, CA, USA.
Affiliate Management Days – yearly event for affiliate managers.
London Affiliate Conference / Amsterdam Affiliate Conference – major events.
Performance Marketing Insights – one event in Europe.

more detail: Digital Marketing Conference Calendar