Note-taking app; free for iPhone, iPad and Android ($5/month for premium services)

Tired of forgetting the brilliant ideas you have when inspiration strikes on the fly? Evernote is a note-taking app that works as a virtual filing cabinet. Organize your ideas into “notebooks” according to content—choreography ideas, Tuesday night’s jazz class playlist, business plans. Within each notebook you can create individual folders: Fill your choreography ideas notebook with notes on your next competition piece concept, a costume checklist or a picture you just snapped of something that inspired a phrase. You can add symbols and annotations to any image you capture.

Evernote is available for most mobile devices and all computers, so once you create an account, your notebooks will automatically sync across all of your devices as you add information and make changes.