AndreaMosaic - With AndreaMosaic you can create your own photographic mosaics made with your own pictures.
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.
WidsMob Montage - Make stunning mosaic photos or montage shape with tiles, which supports both JPEG and PNG files.
Standard Notes - A safe place for your notes, thoughts, and life's work
Mosaic Creator - Mosaic Creator is professional mosaic tool. You can create your own picture mosaic.
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.