The Project Tools system adds project management capabilities to the Monster Mayhem Discussion Board. Depending on how the administrator has configured this system, you will likely be using it to report bugs or make suggestions.
The wiki adds an article system to the Monster Mayhem Discussion Board. Depending on how the administrator has configured this system, you will likely be using it to view or contribute to a knowledge base.
The Blog system gives you your own personal space at Monster Mayhem Discussion Board. Depending on how the administrator has configured the blog, you will be able to create your own entries and control who may view them.