* Dynamic DNS: [heartbeat](https://www.mirbsd.org/cvs.cgi/contrib/code/heartbeat/) ([sobre](https://www.mirbsd.org/permalinks/wlog-10_e20130520-tg.htm#e20130520-tg_wlog-10)).
* Keyserver: [puppet-onak](http://git.puppet.immerda.ch/?p=module-onak.git).
* OpenID Provider:
+ * [Run your own identity provider](http://wiki.openid.net/w/page/12995226/Run%20your%20own%20identity%20server).
+ * [php-openid](https://github.com/openid/php-openid).
+ * [simpleid](http://simpleid.koinic.net/).
* [OpenID URL](https://drupal.org/project/openidurl).
* [simplesamlphp](http://packages.debian.org/stable/web/simplesamlphp).
* Proxies / balanceamento de carga como o [Deflect](http://wiki.deflect.ca).