Cool SEO Tool for Chrome is a simple but very useful Chrome extension for generating site maps, doing an SEO analysis and extracting links from a website.

This extension is not only useful but it is also pretty simple to use.

You don't have to download it, you can simply add a website to it and it will generate its own site map. If you want to get all the links, you can export them. The only drawback is that you need to select your own website from a list of websites and that the export option is quite limited. You can do more than just that.