Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
WebSnapperPro - WebSnapperPro (formerly known as Red Snapper) lets you capture web pages - exactly as they appear...
Web ScrapBook - A browser extension that captures the web page faithfully with highly customizable configurations.
Paparazzi! - Paparazzi! is a small utility for Mac OS X that makes screenshots of webpages.
SingleFile - Save a complete page into a single HTML file