It appears that there are some significant changes ongoing with GNS3.
As mentioned by the GNS3 CEO and co-founder Stephen Guppy on 11th of August 2014, the new GNS3 will be more polished and will migrate to a multi-vendor emulation platform. For those using this tool, it’s a well known fact that GNS3 was mainly focused to emulate Cisco platform, evolving to support vPC and VirtualBox virtual machines.
They have a new very polished website accessible at new.gns3.net where you can also download the GNS3 1.0 Beta 1 software.
I did grab a copy of the Beta 1 and installed on a Windows system (the only one which had right now on hands). You can see a screenshot below.
To be honest, first impression is that not much did change, except some buttons / icons here and there. Of course this just after a quick look from my side. I will test the software in the next days and come back with an update.
If interested, you can check the press release from 26th of August 2014 for more details about upcoming changes in the GNS3 organisation.