This powerful post from D. Mourlam describes the apps that can not only enhance lessons so they are universally-designed but can also be used by learners to express what they know. He provides a description of each app and what the UDL Connections are with each app.
> Videolicious and Flexible Methods of Expression and Apprenticeship
> iMovie and Flexible Methods of Presentation
> Skitch and Flexible Methods of Expression and Apprenticeship
> Evernote and Flexible Methods of Expression and Apprenticeship
> Twitter and Flexible Options for Engagement
> Facebook and Flexible Options for Engagement
> Prezi Viewer and Flexible Methods for Presentation
> VoiceThread and Flexible Methods of Expression and Apprenticeship
> Skype and Flexible Options for Engagement
> Screen Chomp and Flexible Methods of Expression and Apprenticeship