TWM Logotester is a free and easy way to instantly test the quality of your logo. Built and reviewed by professional designers this product will test your logo against design standards in 4 areas: 1. Uniqueness 2. Scalability 3. Background tolerance 4. Colors
Wow! This is awesome, especially for people who commission a custom logo (and might not be very familiar with what makes a logo good). This tells you if the designer used an existing logo and tried to pass it off as their own work. If you’re a logo designer, it can help you check whether you accidentally copied a logo you saw ages ago or if your idea has already been executed.