CardBoard allows teams to collaborate online and build whatever they can imagine. It is designed to be simple to use so you don't need to go through a ton of training. Get your whiteboard started quickly by using one of our built in templates. Hold your next retrospective or agile planning meeting with CardBoard. Try now for free => https://cardboardit.com
Xmind - Xmind is a brainstorming and mind mapping application.
GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.