I wrote my first webpage during the reign of Windows 98, back when the time period and my own inexperience made such a sin excusable. Sure, Front Page would generate a bunch of surplus HTML (newer, hipper tools such as GWT do the same thing) and junk that didn't work on all browsers, but in retrospect it wasn't that bad and the ability to instantly see what the page would look like as I wrote it imbued a level of creativity in my first site which all later iterations have lacked.
One feature I really missed as time went on was being able to quickly preview different fonts to find the one that fit. “Google Font Previewer for Chrome” is a plugin for the Chrome web browser that brings back this ability; it allows you to quickly preview how certain fonts would look on a web page so you can find one you like. It also provides CSS snippets so you can copy and paste the result into your own stylesheet.
This tool is so nice its making me reevaluate every font I've been using on this website. I'd say something like “I don't know how I ever got by without it!” but one look at this page would reveal that for the lie it is since I clearly didn't get by without it. With this tool however there is now hope.