From 1.10.69 (see #17784), here are the most important updates:

Minor 1.10 releases:

• Amazon S3 Added support for a new configuration named BucketAccelerateConfiguration which supports faster uploads/downloads to S3 buckets.
• Adding several missing throttling error codes for API Gateway and S3.
• Amazon S3 Introducing a new version of the ListObjects (ListObjectsV2) API that allows listing objects with a large number of delete markers.

1.11:

AWS SDK for Java:

• Improved URL encoding for REST clients.
• Dropped usage of Json.org library in favor of Jackson.
• Updated retry policies to include jitter during backoffs.
• Generate output POJOs for all operations.
• Renamed the aws-java-sdk-flow-build-tools-{sdkversion}.jar to aws-swf-build-tools-1.0.jar. The jar is also available in Maven.

AWS SDK for Java - Amazon S3:

• Added support to return the part count of an object in object metadata. You can also download a part by setting part number in GetObjectRequest.
• TransferManager supports parallel downloads for multipart objects.
• Default to Signature Version 4 signing process in all regions.

Apache HttpClient upgraded to 4.5.2