Adobe Acrobat makes the pdf files from a scan. You just need to make sure it isnt the reader version. The program is expensive, ussually about $250.
If you dont want to scan, just convert word docs to .pdf files, there is a nice free office suite (word processor, presentation maker, and spreadsheet maker) called "easyoffice" that will convert them for you. I havent used this program alot, but the little bit I have used it, it is a very nice alternative for MS Office, and you can't beat the price! it is a 28mb download.