If you want to learn Git then one of the best resource is the Pro Git book, written by Scott Chacon and Ben Straub. You can read it for free online and I highly recommend it.
First time I got access to the internet in late 90s and since then I have been quite active online. Until late 90s there were no popular social networking sites but there were chatrooms (Yahoo, IRC and AOL), file sharing sites (Napster) but it was in early 2000s when sites like myspace and orkut became popular and I like many other used them.
I finished my school in 1999 and my engineer in 2003 so honestly there was not really a big need to connect with old friends. Usually we used to call our close friends or just go to their houses. That was pretty much it back then. However these social networking sites provided a way to peek into what your old school mates are doing. It also provided a platform where you can share things and seek approval from other in a form on…
Atlassian has a public roadmap of various which I believe provides valuable information for someone considering these tools for their organisation. This public roadmap will help them take decisions.