Any PDF Converter is a tool designed to do just this. It can convert more than 500 document formats, such as DOC, XLS, and PPT, as well as the more complex PT5 and RTF, and even images and animations in JPEG, BMP, and GIF.
The interface of the program is really simple, and it has several available languages so anyone can use it. You just have to add the documents you want to convert to the main window and choose the folder where you want to save your PDF file.
The document will be converted into a PDF in a matter of seconds. Besides this, Any PDF Converter can also convert many files simultaneously, saving you plenty of time on this task.
The trial version works for 30 days.