I'm not expert, but there's a couple of things you could investigate: Licensing: You could license it and then get a flat fee per license sold. This gets arou

I'm not expert, but there's a couple of things you could investigate: Licensing: You could license it and then get a flat fee per license sold. This gets around the problem that someone mentioned about getting a % of revenue and then having the company bundle the product. Also, then you should sign you to a non-compete, which they should pay you for, so that you don't undercut them. Sell outright: Figure out how much the software is worth, come up with a revenue model and then sell it for 3x sales, or something like that.