Tick Counter: Enter a date and time, choose colors, and get the embed code for a countdown timer widget.
Daily Content Web Widgets: Surknetkids offers widgets that update daily, including the Daily Chuckle and Daily Factoid.
The Free Dictionary: This site offers a variety of content updated daily. Click Customize and choose which content you want, including Word of the Day, Daily Grammar Lesson, Word Trivia, This Day in History, and Hangman.
Wonderopolis: Each day, this widget will automatically update with the new Wonder of the Day from wonderopolis.org.
AccuWeather: Display the current weather conditions or the 36 hour forecast. Set it to detect a user's location or set it to display weather for a specific city. AccuWeather widgets are responsive to fit any screen size.
Feedwind: Display RSS feeds on your website in a scrolling widget. Many websites and blogs have RSS feeds, so Feedwind is capable of embedding information from many different sources. The trick is to find the RSS feed of a website (if it even has one). Feedwind widgets are responsive to fit any screen size.