My favourite today is mapofcoins.com
You can browse alt-coins list here: coinwik.org
You can compare coins here: coinplorer.com/Hardware/CurrenciesComparison
There is forum, cryptocointalk
See, here coingen.bluematt.me and +10 hidden market places with constructors.
You can't find full list of all alt-coins. It doesn't exist.
Number of alt-coins grows so fast. Probably, every day there are appear 10-20 alt-coins. This is unstoppable trend. In the Jan of 2015 there will be more than 1000 alt-coins in one hundred percent.
See, another one constructor COIN NUKE | COIN CREATION SERVICE | +EVERYTHING FOR YOU COIN +ESCROW +TOOLS