What are some alternatives?
When comparing Phot-Awe and TexturePacker, you can also consider the following products
PhotoALBM - Online social photo sharing community.
ShoeBox - Free unlimited photo storage, so you can rediscover your photos anywhere. Available for iPhone, iPad, Android, Mac and PC.
Flickr - image and video hosting website
Alfred Spritesheet Unpacker - A simple application which converts an animation spritesheet into individual frames.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Ruler - It's a screen ruler for Windows.