pretalx is a free and open-source conference management software. It provides everything you’ll need for a conference schedule: A fully customizable Call for Papers, speaker interactions, support for different review processes (including double-blind reviews). pretalx also comes with an interactive schedule editor, and interfaces with many other tools due toits open API, many import and export formats, and its rich plugin system allowing everybody to add what they might be missing.

While commercial pretalx hosting (and development) is available at pretalx.com, pretalx is completely open source and well-documented, allowing events like FOSS4G to keep complete control over their and your data, by hosting pretalx themselves.