Raven Tools and Site Auditor are currently inaccessible due to widespread outages with Amazon's S3 web-based storage service. Amazon is working on restoring this service which, in turn, will bring both Raven products back online. For more information, keep an eye on Amazon's Web Services Health Dashboard, which will have the most up-to-date information regarding this issue:
https://status.aws.amazon.com/
We're monitoring this situation, and are optimistic that Amazon will make quick progress in resolving these outages.