Web Applications
A/B Test Calculator (2015) – ABTestCalculator.com
Emergent Mind (2014) – EmergentMind.com
Lean Domain Search (2012+) – LeanDomainSearch.com
Lean Designs (2011 – 2012)
Preceden (2009+) – Preceden.com
HNTrends (2009)
Domain Pigeon (2009)
Poker
ALL IN Expert (2008)
HUSNG Bot (2008)
Shortstacking Bot (2007)
Poker Blog (2006)
PokerShark (2006)
TetriNET
TetriNET Bot (2002)
AOL
AOL-Files (2000) – Archive – AOL Hackers Index
Modal Tool (2000)
Hacking iWin (2000)
Exploits Online (2000)
Meridian (1999)
Alpha32 (1998)
Revolution (1998)
Matt Mazur 
Perhaps this could be a useful tool in middle or high school in teaching students how to set up outlining for notes.
Thanks for this awesome list. Another great domain tool is Agile Domain Search (http://agiledomainsearch.com) – A free, powerful domain name generator that actually looks good. Simply enter a keyword to find great available domains for your website or startup.
这位在伊拉克执勤的美国大兵居然每天用45分钟就开发了自己的互联网产品 _ 三欧吉
這位在伊拉克執勤的美國大兵每天45分鐘 開發瞭自己的互聯網產品 | Comeposts.com
不要再拿當兵會變笨當理由了！美國大兵用每天 45 分鐘，半年打造新創事業 | 发头条
这位在伊拉克执勤的美国大兵居然每天用45分钟就开发了自己的互联网产品 测试
Experimenting with waking up early to work on side projects – Matt Mazur