Original version (Latin):

• one big HTML file  (on my site)
• one big HTML file  (I. Barral Sánchez)
• many HTML files  (catho.org)
• many small HTML files  (www.intratext.com)
• with navigation menu, and with sources  (Kuria Lublin)
• two PDF files (Latin-Polish edition, with sources)  (Kuria Lublin)
   

Translations:

• English translation  (J. Gray)
• English translation  (www.intratext.com)
• French translation  (catho.org)
• French translation  (Revue de Droit Canonique)
• French translation  (www.intratext.com)
• Italian translation  (www.intratext.com)
• Polish translation, with sources  (Kuria Lublin)
• Polish translation  (www.intratext.com)
• Romanian translation  (www.intratext.com)
• Romanian translation  (one big PDF file)
• Ukrainian translation  (www.krotov.info)
• Ukrainian translation  (www.ugcc.org.ua)

A German translation of the CCEO has been published as a book; you won't find the German translation online.