diff --git a/README.md b/README.md
index 629457c7..46bd05af 100644
--- a/README.md
+++ b/README.md
@@ -293,6 +293,7 @@ A curated list of awesome Python frameworks, libraries and software. Inspired by
 *Libraries for downloading.*
 
 * [s3cmd](https://github.com/s3tools/s3cmd) - A command line tool for managing Amazon S3 and CloudFront.
+* [s4cmd](https://github.com/bloomreach/s4cmd) - Super S3 command line tool, good for higher performance.
 * [youtube-dl](http://rg3.github.io/youtube-dl/) - A small command-line program to download videos from YouTube.
 * [you-get](http://www.soimort.org/you-get/) - A YouTube/Youku/Niconico video downloader written in Python 3.
 * [coursera](https://github.com/coursera-dl/coursera) - Script for downloading Coursera.org videos and naming them.