POEditor - The translation and localization management platform that's easy to use *and* affordable!
Xmind - Xmind is a brainstorming and mind mapping application.
Weblate - Weblate is a free web-based translation management system.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Crowdin - Localize your product in a seamless way
FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.