This font has some common symbols used in knitting charts, numbers, and extra characters and symbols that could be used however you like. The image above is a sample chart that I made using my font and the spreadsheet program Numbers.
You can view and download the font here.
Here are some of the characters.
I tried to choose logical characters to go with each symbol. For example, p and P make the purl symbol. The k is a twisted knit stitch. For some stitches the lowercase is a knit version and uppercase is a purl version. Since the symbols for cables normally take up more than 1 block they are not included.
I used http://www.myscriptfont.com to make this font from my own handwritting.