Replace recommendation of GUI application for S3. Transmit is outdated, missing AWS4 signature version support (crucial for new regions) and multipart uploads besides ACLs, versioning, lifecycle configuration, storage classes and server side encryption.

README.md

@@ -603,7 +603,7 @@ S3
 	-	[**s4cmd**](https://github.com/bloomreach/s4cmd) is a replacement, with greater emphasis on performance via multi-threading, which is helpful for large files and large sets of files, and also offers Unix-like globbing support.
 -	**GUI applications:** You may prefer a GUI, or wish to support GUI access for less technical users. Some options:
 	-	The [AWS Console](https://aws.amazon.com/console/) does offer a graphical way to use S3. Use caution telling non-technical people to use it, however, since without tight permissions, it offers access to many other AWS features.
-	-	[Transmit](https://panic.com/transmit/) is a good option on OS X.
+	-	[Cyberduck](https://cyberduck.io/) is a good option on OS X and Windows with support for multipart uploads, ACLs, versioning, lifecycle configuration, storage classes and server side encryption (SSE-S3 and SSE-KMS).
 -	**S3 and CloudFront:** S3 is tightly integrated with the CloudFront CDN. See the CloudFront section for more information, as well as [S3 transfer acceleration](https://docs.aws.amazon.com/AmazonS3/latest/dev/transfer-acceleration.html).
 -	**Static website hosting:**
 	-	S3 has a [static website hosting option](http://docs.aws.amazon.com/AmazonS3/latest/dev/WebsiteHosting.html) that is simply a setting that enables configurable HTTP index and error pages and [HTTP redirect support](http://docs.aws.amazon.com/AmazonS3/latest/dev/how-to-page-redirect.html) to [public content](http://docs.aws.amazon.com/AmazonS3/latest/dev/WebsiteAccessPermissionsReqd.html) in S3. It’s a simple way to host static assets or a fully static website.