I just rolled out a new graphing resource at aschool.us/graphs. This new tool allows you to quickly create SVG graphs which you can then download and edit further with an SVG editor such as Insckape or Adobe Illustrator. Currently it only does horizontal, bar, and line graphs with or without grid lines. The plan is to have this website be a resource for teachers when teaching students how to make graphs and have some interactive graphs to help students learn how to read graphs.
Would love to hear any feedback.