HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
Paparazzi! - Paparazzi! is a small utility for Mac OS X that makes screenshots of webpages.
Web ScrapBook - A browser extension that captures the web page faithfully with highly customizable configurations.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
SingleFile - Save a complete page into a single HTML file
Snagit - Screen Capture Software for Windows and Mac