Can anyone recommend a good software (Free-preferably online as well) that I can use to make my art/sprites more realistic? to give you an idea of my current stuff here:

I'm going for a software I can use to make my sprites look better or more realistic.

some development pics for my game. I may have reposted some. kinda just an art dump.

I need help. pls read article for details. the image above is not by me btw.

FIVE NIGHTS AT FREDDY'S 2 - Toy Animatronics Vectors

Working on pushing Scratch, A kids coding platform, to its limits by creating a Halo FPS. It's gonna follow the story of an ODST but during Reach. Here are some development pics. (I'm constantly updating the game so it may look different when released)

Dude

Some new thumbnails I've made for my Halo game.

The first one is a complete redesign from one of Daves777 odst games. I just made it into a silhouette and added extras.

Second one is original and the third one was just Daves777's odst with a background.

My latest fanarts here. Their both the same except for the camera effects on the first one. All art done by me. Gosh this took forever but I'm quite proud of the end product. Its all cartoon styled.

Me when fruits are flying

(Original designs by Knockoutsplace, no clue if he has a Gamejolt account)

Working on pushing Scratch, A kids coding platform, to its limits by creating a Halo FPS. It's gonna follow the story of an ODST but during Reach. Here are some development pics. (I'm constantly updating the game so it may look different when released)