The WebsitesSaver can download the HTML files of a given websites list and their corresponding resource files (images, CSS and javascript). You can open those websites locally using your browser.
Examples:
$ python saver.py -h
print help message
$ python saver.py -u https://www.w3schools.com/
save the html file of www.w3schools.com to local directory httpswwww3schoolscom and resource files(img, css, js) to httpswwww3schoolscom/httpswwww3schoolscom_files
$ python saver.py -l myfile.txt
save the websites of all urls in the file myfile.txt