I was browsing around trying to figure out what Library to use for downloading images and Json data and ran into a couple of interesting post.
Comparing a bunch of Libraries like Volley, Picasso, Fresco:
Introduction to Fresco: A new Image library for Android
Introduction to Glide, Image Loader Library for Android, recommended by Google:
If you look on github for most popular mirrors of the VolleyLibrary you'll find the DWorkS VolleyPlus and the McXiaoke of which the first one has some added functionality like additional Request types and image caching.
You can read more about them at: