This is too broad a question, I think. What are you looking for, example-wise, and why?<p>Bear in mind, what's "worth the money" differs heavily on who the user is and why they need a given solution. A problem for me may not be worth much money to fix, because it doesn't cause me a lot of issues or it doesn't happen often. But that same problem may be an incredibly frequent occurrence and a huge issue for them, and worth a large amount of money to prevent.