Platforms: iOS, Android (both free)
You'll never have to take a baseball bat to a fax machine again. Use the iFax app to scan documents via your tablet’s camera, then fax them directly to real fax numbers. This is similar to a document-scanning app, but you can send to fax machines rather than going through email. iFax is free to download, but powered by in-app payments: 99 cents for five pages, $1.99 for 10 pages, $2.99 for 15 pages, up to $17.99 for a one-month subscription. You can also receive faxes via iFax, though that costs $27.99/month.