Web socket is a technology developed to establish a bi-directional communication between client and server, over the web. It works on top of TCP and hopefully will render hacks like long polling obsolete. It’s supported by all modern browsers with 2 exceptions – opera mini and the default android browser (chart can be found here).
Forms authentication has an option to use a web.config based authentication. One of the possible encryption algorithms is sha1. To calculate it, you can create a tool in c# (I even did that, but.. I lost it when my drive crashed) or you can use python.
I’ve used a few version control systems: visual source safe, subversion, git, mercurial and tfs. My current favourite – git. It it’s the most popular one at the moment, but to be honest there’s a good reason for that. It has a gigantic learning curve, but once you grok the concept, everything falls into place. My second choice – subversion. I’ve used it for a long time and it got the job done. The one I am using at the moment – tfs and here’s where the story starts.