GNS3 version 2.0 release candidate 1 has been released. This version should mostly be stable excepting a few bugs here and there, please help us track them down. We expect to release a final version of GNS3 2.0 in April.
Free software worth $200: https://goo.gl/613TUF
GNS3 2.0.0 RC1 Download: https://github.com/GNS3/gns3-gui/releases/tag/v2.0.0rc1
GNS3 Support (Go here if you need help): https://gns3.com/community