LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
Web ScrapBook - A browser extension that captures the web page faithfully with highly customizable configurations.
OmniGraffle - OmniGraffle is for creating precise graphics like website wireframes, an electrical system designs, or mapping out software class.
HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
Moqups - The most stunning HTML5 app for creating resolution-independent SVG mockups, wireframes & interactive prototypes for your next project
Archivarix Website Downloader - Website online downloader and Content Management System (CMS) existing site converter.