Mile IQ is my newest work tool. It's an app for Android and Apple Phones available in both the App Store and Google Play that automatically tracks miles you drive.
The Feed is a website to order snacks, supplements, and meal replacements. It's geared towards athletes but not of any particular sport.
Weather site usability depends on your needs and wants. NOAA has it all from radar to satellite imaging, but my favorite is the custom weather forecast charts.
CandlePowerForums is a website revolving around flashlights. Everything from building your own (way over my head at this point) to miniatures to several thousand dollar lights. The experts at this site are very helpful and can suggest a light to you for your specific needs and applications on there Recommend Me a Light For... page. If you ever have a wonder about anything flashlight related, check them.
HayTalk is another forum-style website with a lot of information. Don't let the name fool you, the forums cover many things besides just farming. There's plenty of information about cattle, pasture, equipment and other country needs. There's sections of forums for: Ranching, Haying, Classifieds, and information about Things Past.
Doctor Yourself has been a worthwhile website for me in the recent past. Although not a handyman type website, the site has information on health that is not just not limited to cold, flu or allergy issues.
Engineering Toolbox is an awesome tool to have at your fingertips. The site has information on more things than I could ever list, but some I use frequently are
Flash points, Freeze/Melt points, and Metal melt points. There are unit converters and information on many things a tinkering person may need.
One of my favorites
ITS Tactical: Imminent Threat Solutions
The site encourages the gain of as much knowledge as possible to defend and protect yourself, and help you to be prepared for any situation.