Lux Sketches !

Here´s some Lux art I drew! My drawing style is very "comic" oriented, so don´t expect anything too realistic. I mostly work on a grayscale with pencil, but I would like to see if you guys prefer a colored version of it or not. If so, what good ( and free) programs do you recommend to digitally color it?

Without further ado, Enjoy!

http://i.imgur.com/5S2RHQG.jpg

http://i.imgur.com/qO6IGma.jpg

http://i.imgur.com/xvWLKEh.jpg

P.S: Feel free to comment on how to make these better!