Agenda - A date-focused note taking app for both planning and documenting your projects.
Octopus.do - Build your website structure in real-time and rapidly share it to collaborate with your team or clients. Start prototyping websites or apps instantly.
Notepin - Extremely simple note-taking + blogging ✍️
PowerMapper - Create visual HTML site maps and XML sitemaps for search engines of any web site quickly and easily.
Bear - Bear.app is a note-taking and content writing app that helps you boost productivity with its intuitive tools.
FlowMapp - FlowMapp is a UX planning tool for creating visual sitemaps and user flow.