Logging Tools in Magento

[shivani]

What tools are popularly used for logging and auditing in Magento.

Magento Enterprise has inbuilt access logs and auditing i understand. However for the community ediition of Magento what options/tools are used for logging the user actions?

[chiefair]

For system, firegento logger https://github.com/firegento/firegento-logger

User audit, I'd like to see what's out there as well.