For me, Images.jl. The design is just great, and a lot of work (mostly from Tim Holy at WUSTL) went into the array handling code of base Julia and of Images.jl

For me, Images.jl. The design is just great, and a lot of work (mostly from Tim Holy at WUSTL) went into the array handling code of base Julia and of Images.jl to make it all fast and easy to use. I'll give you one quick example of the design. Images are just arrays of "Colors". The upside is that you can write generic code that handles arrays of Colors of any kind, meaning you don't have to worry about iterating over the color axis. You also don't have to worry about whether your 100x100x3 array is three images (at different times or locations) or one image with three RGB channels. All of this comes at little to no cost in terms of speed. Check the docs here: http://juliaimages.github.io/latest/ http://juliaimages.github.io/latest/ But fair warning, it still needs some fixes for 0.7/1.0. We're on it!