http://www.anything2pdf.com - is a nice and simple PDF generator. You simply select a file on your computer, click "generate PDF" and it will create the pdf file and a file download window will open.
I converted a few different files and it worked fast and did a good job.
I usually use CutePDF, but that has to be installed as a printer on your computer. This is online, meaning you can use it where ever you happen to be using a computer.
According to the site (which is just one page):
"You are welcome to convert any kind of file to a PDF. Below is a list of filetypes that are definitely supported:
- Microsoft Word Document
- Rich Text Format Document
- Plain Text Document
- Most Image Formats (PNG, JPG)"
Share your free PDF generators/converters in the comments.