The following software is used in eXorithm.
- CodeMirror by Marijn Heverbeke and the PHP extension by Vlad Dan Dascalescu
- WMD Editor by Attacklab, as well as additions for Stack Overflow and Open Library, and by klipstein.
- PHP Markdown by Michel Fortin based on the Original Markdown by John Gruber
- Portions of MediaWiki (for diff)
- jQuery UI
- jQuery Watermark
- jQuery Autocomplete
- jQuery PNG Fix