SecureZIP, the latest product from PKWARE, creators of the .ZIP archive format, is free, supposedly for a limited time. Get it at:
http://www.securezip.com/
Paint.NET will now run natively on 64 bit systems with all the advantages that brings including faster application of special effects such as sketch, bulge, etc. Now beats Corel PaintShop Pro.
http://www.getpaint.net