1. Display / Media Buys
1.1. Self-Serve
1.1.1. http://megaclick.com
1.1.2. http://mochimedia.com
1.1.3. http://sitescout.com
1.1.4. http://pulse360.com
1.1.5. http://www.google.com/displaynetwork
1.1.6. http://www.adperium.com
1.1.7. http://www.adzerk.com/
1.2. http://cpxinteractive.com
1.3. http://undertone.com/
1.4. https://advertisers.federatedmedia.net/
1.5. http://www.clixsense.com/
1.6. http://adbuyer.com
1.7. http://adengage.com
1.8. http://adblade.com
1.9. http://advertise.com
1.10. http://www.advertising.com
1.11. http://admarketplace.com
1.12. http://www.contextweb.com
1.13. http://adknowledge.com
1.14. http://admanage.com
1.15. http://casalemedia.com
1.16. http://rubiconproject.com
1.17. http://www.valueclickmedia.com
1.18. http://tribalfusion.com
1.19. http://adroll.com
1.20. http://chitika.com
1.21. http://www.traffiq.com
1.22. http://www.burstmedia.com
2. Mobile
2.1. Blind Networks
2.1.1. http://www.mojiva.com
2.1.2. http://www.adleads.com
2.1.3. http://inmobi.com
2.1.4. http://www.buzzcity.com
2.1.5. http://www.madvertise.de
2.1.6. http://adfonic.com
2.1.7. http://www.admob.com
2.1.8. http://www.admoda.com
2.2. Premium Blind Networks
2.2.1. http://www.greystripe.com
2.2.2. http://www.millennialmedia.com
2.2.3. http://www.jumptap.com
2.2.4. http://huntmads.com/?lang=en
3. PPV / CPV
3.1. Top Five
3.1.1. http://www.trafficvance.com
3.1.2. http://www.leadimpact.com
3.1.3. http://mediatraffic.com
3.1.4. http://adonnetwork.com
3.1.5. http://directcpv.com
3.2. 2nd Tier
3.2.1. http://clicksor.com
3.2.2. http://adoori.com
3.2.3. http://findology.com
3.2.4. http://www.jemamedia.com
3.2.5. http://ezanga.com
4. Social
4.1. http://www.facebook.com/advertising
4.2. https://ads.pof.com
4.3. https://www.myads.com
4.4. Twitter
4.4.1. http://sponsoredtweets.com
4.4.2. http://ad.ly
4.4.3. http://izea.com
4.5. App Traffic
4.5.1. http://rockyou.com
4.5.2. http://socialhour.com
4.5.3. http://www.socialmedia.com
4.5.4. http://advertiser.cubics.com
4.6. http://www.reddit.com/help/selfservicepromotion
4.7. https://www.stumbleupon.com/pd
5. Search / PPC
5.1. The Big Two
5.1.1. http://google.com/adwords
5.1.2. https://adcenter.microsoft.com
5.2. 2nd Tier
5.2.1. http://miva.com
5.2.2. http://7search.com
5.2.3. https://ads.kanoodle.com
5.2.4. http://www.looksmart.com
5.2.5. http://www.search123.uk.com
5.2.6. http://www.adbrite.com
5.2.7. http://www.bidvertiser.com
5.3. In-Text
5.3.1. http://kontera.com
5.3.2. http://infolinks.com
5.3.3. http://trafficvance.com
5.3.4. http://www.outbrain.com/