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.
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
Standard Notes - A safe place for your notes, thoughts, and life's work
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.
Moqups - The most stunning HTML5 app for creating resolution-independent SVG mockups, wireframes & interactive prototypes for your next project