Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.

productboard - Beautiful and powerful product management.

Agenda - A date-focused note taking app for both planning and documenting your projects.

ProdPad - ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.

Left - A minimalist multi-platform text editor

ProductPlan - Cloud-based product roadmap software solution