S3Cmd, S3Express: Fully-Featured S3 Command Line Tools and S3 Backup Software for Windows, Linux and Mac. More than 60 command line options, including multipart uploads, encryption, incremental backup, s3 sync, ACL and Metadata management, S3 bucket size, bucket policies, and more. List and query S3 objects using conditional filters, manage metadata and ACLs, upload and download files.
This site describes the Certificate Transparency effort being spearheaded by Ben Laurie, Adam Langley and Stephen McHenry. The effort is designed to significantly increase the security of the Public Key Infrastructure used by web sites and services.