Reference SwiftProxy

README.md

@@ -129,6 +129,7 @@ References
 * Ceph [s3-tests](https://github.com/ceph/s3-tests) help maintain and improve compatibility with the S3 API
 * [fake-s3](https://github.com/jubos/fake-s3) provides functionality similar to S3Proxy when using the filesystem provider
 * Another project named [s3proxy](https://github.com/abustany/s3proxy) provides HTTP access to non-S3-aware applications
+* [SwiftProxy](https://github.com/bouncestorage/swiftproxy) provides similar functionality for the OpenStack Swift API
 
 License
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