Open Source Alternative is a directory that lists open source alternatives to popular commercial software. So if you ever come across a situation where you need some commercial software but you don’t want to buy it or you don’t have time for it. Then search Open Source Alternative for a free alternative. For example see osalt’s Photoshop page where it lists five software that you can use instead of using Photoshop. Some software may not be as sophisticated as their commercial counterparts but they can work for you and they are free too.