Juxta is an open-source tool for comparing and collating multiple versions of a single textual work. The software allows users to set any of the variations of a text as the base document for creating a scholarly edition. Users can also add or remove versions, change the base text, annotate comparisons, and save the results.
To create a scholarly edition, first a user creates an edition, then creates documents within the edition. Then, a user can either upload images of texts and transcribe them into the document using OCR, or a user can type or paste text into the document. A user can then compare different versions of the same text in order to see their differences and decide which to use as the base document. After that, users can edit and annotate the transcription. Finally, the edition can be published to its own website.
For more information on this process, see the videos on the "My Desk" part of your account.