Perseids is a collaborative online environment being developed by the Perseus Digital Library to enable scholars and students to edit, translate, annotate and create digital publications of and about ancient texts.  Perseids is an integration and extension of open source tools, services and data models developed by a number of other projects, including  Papyri.info’s Son of SUDA Online (SoSOL) tool, the CITE architecture from theHomer Multitext Project, the Open Annotation Data Model, and annotation editors from the Alpheios Project.