v1.3 of CropperPlugins is out.
It includes a couple new plugins - Send-to-ImageShack and Send-to-TwitPic - as well as a bunch of reliability and correctness changes to existing plugins.
The complete list is:
I haven't been able to test the S3 plugin because I don't have an Amazon S3 account. Also I haven't been able to test the OneNote plugin for similar reasons.
Check it out. http://cropperplugins.codeplex.com