diff --git a/README.md b/README.md
index 6e67c17..1b61702 100644
--- a/README.md
+++ b/README.md
@@ -98,13 +98,19 @@ S3Proxy does not support:
 * POST uploads
 * bucket and object ACLs ([jclouds issue](https://issues.apache.org/jira/browse/JCLOUDS-660))
 * object metadata with filesystem provider ([jclouds issue](https://issues.apache.org/jira/browse/JCLOUDS-658))
+* object server-side encryption
 * object versioning
 
 References
 ----------
 Apache [jclouds](http://jclouds.apache.org/) provides object store support for
-S3Proxy.  Ceph [s3-tests](https://github.com/ceph/s3-tests) help maintain
-and improve compatibility with the S3 API.
+S3Proxy.
+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.
 
 License
 -------