Beside COMODO Personal Firewall (Free) another free firewall your should consider will be Online Amour. Both firewall score close to 100% on Motousec Firewall Challenge
http://www.tallemu.com - Online Amour.
Another free PDF creator. MagicPDF. PDF file created my magic is more optimised in size as compare to doPDF. I will give it a try and will report if there is any special finding.