Xmind - Xmind is a brainstorming and mind mapping application.

Steghide - Steghide is a steganography program that is able to hide data in various kinds of image- and...

MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.

OpenPuff - OpenPuff is a professional steganography tool: HW seeded random number generator (CSPRNG)

FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.

SilentEye - SilentEye is a cross-platform application design for an easy use of steganography, in this case hiding messages into pictures and sounds.