xkcd Review is a simple, clean interface for downloading and viewing xkcd comics on your computer. xkcd Review allows you to tag comics if it contains profanity, if it is a favorite, or anything else! Also, the simple search feature allows you to instantly find the comic you are looking for.
Randall Munroe, the creator of xckcd, has released all of the comics under the Creative Commons Attribution-NonCommercial 2.5 License so you are free to use them however you like with very few limitations. xkcd Review helps you by downloading the comics to a common directory and storing the transcript and any other related information in a sqlite database for easy access from other applications. Enjoy!