Here at Zamzar we have been converting files since 2006 for millions of happy customers from every corner of the planet. Take a look at what they think of our service:
It’s @zamzar to the rescue in converting the BBC PDFs - huge thanks to the hardworking folks there.
Old MS Powerpoint files are a high-value conversion, and I really don't know any other tool to perform it.
Zamzar sort of blows my mind.
It makes so much sense to have a web service take care of this process.
Ideal if you're awash with different file formats. Easier than conversion software.