Lately I had to modify the font of one of my comics 'cause I have discovered (way into the story) that the font that I was using wasn't free for commercial use.
After that I had to spend a fair amount of time to fix my mistake and finally ended up creating my own font, the 'Kotofont'.
It's a font that mimic a hand-written style, wrote in small caps and perfectly fit for comics.
If you want it you can download it for free from my website.
After what happened to me I have decided that my font will be 100% free and open: you can modify it and use for anything, hopefully for commercial purposes too
PS: if you try it and experience any technical issue please get it touch!