Notational Velocity is an application for Mac OS X that stores and retrieves notes.
In Notational Velocity, the same area is used both for creating notes and searching. I.e., in the process of entering the title for a new note, related notes appear below, letting users file information there if they choose. Likewise, if a search reveals nothing, one need simply press return to create a note with the appropriate title.
Its unique advantages are as follows:
Or read solutions to other common problems: