As of today (2015-Nov) how many different anonymous type altcoins are there? How many anonymous type altcoins are there out as of 2015-Nov? Also what were their release dates and community size? I'd like to get into an anonymous coin, but I'm unsure which one has the most activity and community support.
Here are a few I have heard of, some are in development some are already being used. 


ZeroCoin:
http://zerocoin.org/


whitepaper:
http://zerocash-project.org/paper


  The road ahead
  
  The plan is to make an altcoin, powered by the new Zerocash Protocol,
  that provides consumers with the financial privacy they expect from
  debit cards, credit cards, and cash. To do this, we plan on release a
  working, non research code quality client based off the bitcoin 0.9.1
  codebase integrating the new Zerocash protocol.



Monero:
https://getmonero.org/home



  WHAT IS MONERO ? Monero is a secure, private, untraceable currency. It
  is open-source and freely available to all.
  
  With Monero, you are your own bank. Only you control and are
  responsible for your funds, and your accounts and transactions are
  kept private from prying eyes.
  
  Want to find out more? An overview of Monero's main features are
  below. If you'd like to try Monero for yourself the Getting Started
  section is an excellent launching point.



ShadowCash:
http://aboutshadow.com/



  SHADOWCORE
  
  An entire privacy-based platform which aims to establish an anonymous
  economy, with multiple features that give people all the financial
  freedom and privacy they should have.
  
  Shadow is a decentralized anonymous communication, commerce and
  currency platform through which the virtual currency, ShadowCash, can
  be transferred. One of the significant advantages of Shadow is its
  deep integration with the rest of Shadow's features as well as
  offering native TOR support for IP obfuscation.



DashCoin:
http://dashcoin.net/



  Dashcoin (DSH) is an automatically mutating anonymous cryptocurrency
  Dashcoin is a Next generation anonymous cryptocurrency and the first
  automatically mutating cryptocurrency created with CryptoNote
  technology. What does this really means? Our network code is always up
  to date with minimal developer cost and close to 0% errors. You are no
  longer depending on developers good will. Concentrate less on
  developers and more on your trades and projects.



Here seems to be page that has gathered a few more anonymous altcoins:
http://www.altcoinfever.com/anonymous-cryptocurrency-altcoin/


As for the size of any of these communities, that I am unsure of. I just wanted to present you with options I have found. I cannot guarantee the validity of any of these altcoins and their claims of anonymity.