The Juxta family of software (Juxta, Juxta WS, and Juxta Commons) allows you to compare and collate versions of the same textual work. Juxta Commons is an online space powered by the open-source Juxta Web Service that lets you collate sets of two or more texts and share online visualizations of the differences between them. Side-by-side or "heat map" visualizations can be viewed on the Juxta Commons site, while embedding codes are available for sharing a compact version of the heat map visualization on your own blog or website. Collation results can also be output as an XML file with TEI parallel segmentation markup, or as a Word document or HTML file with a base text and traditional textual apparatus. Development of Juxta Commons was sponsored by NINES.