4chan Downloader

You can automatically download images from your favorite image board. One of the coolest parts is that you can automatically set this program to watch your favorite threads so that whenever a new image of your interest is posted, your computer will automatically download the image so that you can view at your convenience. You won't have to sit and wait around to see the content you like, instead you can rely on the program to passively save the best content so that you can view it at a later time. 

Features:

• Multiple imageboards are supported such as 4chan, 2chan, chanarchive.org, and others. 
• If your favorite imageboard is not supported, there is a plugin that allows you to add it to the program. 
• When you select a new thread, it is added to the program and is saved even when you close the program, so that the next time you open it, it will pick up where it left off and once again begin searching that same thread and saving all images. 
• The program allows you to view thumbnails of all images that it has downloaded. Quickly scan over the images and find ones you are interested in
• Additionally, you can easily choose to open the images, delete the images, or reload the images, directly from the simple interface.
• Also allows you to scan the overview pages so that you have access to these as well. 

This free and open source program is a great choice if you happen to be one of the many people that uses a Chan style imageboard site. It's easy to use and can be customized to your satisfaction, and you can rely on it to catch all the images you are interested in so that you don't have to spend every second parsing for the best images. It will allow you to quickly build up a great library of images that can be used for any number of purposes. 

Works on Windows, Linux, and Mac computers.