aws - simple access to Amazon EC2 and S3. The best command line client I’ve found for EC2 and S3. “aws put --progress my-bucket-name/large-file.tar.gz large-file.tar.gz” is particularly useful for uploading large files to S3. Written in Perl (with no dependencies), shelling out to curl to do the heavy lifting.
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A plug for a Firefox extension I wrote to manage Amazon S3 items:
https://addons.mozilla.org/en-US/firefox/addon/111 62