Yes this site is part blog, but on this site you can download a game maker sprite editor. This is valuable because it can do everything listed on the info part of the site. You can make better games with more sprites because you can have more graphics then just the bunch that came with game maker.
Ren'Py is a visual novel engine that helps you use words, images, and sounds to tell stories with the computer. These can be both visual novels and life simulation games. The easy to learn script language allows you to efficiently write large visual novels, while its Python scripting is enough for complex simulation games.
Ren'Py is open source and free for commercial use. It supports Windows, Mac OS X, Linux, and Android.
Here are links to some anime sprite sheets -- more specifically, sprites from animes such as Bleach and Naruto (LOL).
You could probably make a pretty cool fangame using these sprites, or just insert them as a NPC in your game or whatever.