Attaching PDF files

Ok, January done (more or less) and now moving on to the next problem.

We currently file tax returns (Taxcalc software) and P35s (IRIS/HMRC software)online and are now gearing up for the next phase (CT600 and VAT).

My question is this -

Looking into the future, we see the need to attach .pdf files to Revenue submissions, the most urgent one being Capital Gains computations in April.

We do not have the software to create .pdf files and I was wondering what software people use?

Do you use Acrobat, or one of the other ones to download of t'interweb.

The main criteria are:

easy to use
low cost (not going to be used THAT often).

Edit:

Also, we will need to be able to save excel and word documents as .pdf files!

Any advice would be much appreciated.

Thanks.

Lisa Sheppard