Create-A-Graph Students can explore their visual communication skills with this online graphing tool from the National Center for Education Statistics. The tool helps users make bar charts, line graphs, area graphs, pie graphs, and XY graphs. Five clickable tabs (design, data, labels, preview, and print/save) provide options for customizing each type of graph. A tutorial tells which kind of graph is best for a particular situation.
KNITPRO ~ A great site to convert a picture into a chart/grid for crocheting. just upload your pic and it will make a chart for you. It says knitting but you can use it for crochet also, and its free! Awesome tool for tapestry crochet.