OpenPGP.js

http://openpgpjs.org/

License: GNU LGPL v>=2.1.

used by:

• https://www.mailvelope.com/ (License GNU Affero v==3) for Webmail -- extensions for Chrome/Chromium & Firefox
• Mymail-Crypt for Gmail (License: GPL2) -- extension for Chrome/Chromium

Completeness: ?

Compatibility: ?

Chromium Extension End-to-End

https://code.google.com/p/end-to-end/

Completeness: ? Claims to only create ECC certificates (which curve parameters?)

Compatibility: ?

• Google announced a Chromium extension that supports OpenPGP, see http://googleonlinesecurity.blogspot.de/2014/06/making-end-to-end-encryption-easier-to.html
• Heise newsarticle in DE: http://www.heise.de/newsticker/meldung/Google-experimentiert-mit-End-to-End-Verschluesselung-fuer-GMail-2215680.html

Discussion

• https://news.ycombinator.com/item?id=7843297 Discussion about OpenPGP.js codequality and choice of reimplementation in End-to-End.