You don't need Photoshop or some other advanced piece of software to resize a large number of images at once. You can use Microsoft Office Picture Manager which is part of the Office suite.
Amazing ad, and so true for real. GoldieBlox toy company made this awesome video commercial a couple of days ago and it already has more than 3,3 million views on YouTube. Must watch.
If you want to boost up online presence for your brand, company or product, I recommend you to create a Facebook page. I will show you how to create one and how to get started.