Liveplan - LivePlan helps entrepreneurs and small-to-medium size business owners build dynamic business plans and track performance against their goals.
productboard - Beautiful and powerful product management.
Bizplan - Modern business planning for startups
Aha! Business Model Builder - Create the perfect strategy for your product roadmap
IdeaBuddy - Innovative business planning software
ConTEXT - ConTEXT is a small, fast, powerful and highly compact text editor for the Windows operating system.