Website Planning and Organization Tool » Jumpchart
Toolbox // Outils gratuits en ligne @NumerOOs
WeTransfer
Wireframe Software - Free website wireframe software by Gliffy
Witeboard
World Time Buddy - Ridiculously easy world time and meetings across time zones!
Wormhole - Simple, private file sharing
Yanado - Task management inside Gmail.
Zenkit | A project management tool that grows with you
Zeplin