If you are looking for a file extension that works great on tracking, organizing, and even maintaining projects, you should consider downloading MPP - Microsoft Project File. This extension also works to control workloads and finances. When you download this you will notice that it works to deliver the best that you could imagine. There are also different versions that you must be aware of as well of the MS Project. This is not true though for all of the common project files. Before you download this extension, a list of common programs will be available for you to look at. You will be able to get a general idea of how everything actually works. It really comes in handy when you need it the most.