Celestron's SkyScout personal planetarium ($399 at Amazon.com) lets stargazers instantly identify or locate over 6,000 celestial objects, then provides commentary on the planet or star. It employs a pair of ADXL322 iMEMS accelerometers from Analog Devices, which complement the unit's GPS receiver. They provide accurate inclination measurements so the SkyScout knows what angle the device is pointing relative to the earth's surface. The camcorder-sized device won an adventure gear award from National Geographic last year.
A make-your-own Star Wars Sith Lightsaber hilt is heftier and better-looking than most others out there, according to its maker, Sean Charlesworth. You can 3D print it from free source files, and there's even a hardware kit available -- not free -- so you can build one just in time for Halloween.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies.
You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived.
So if you can't attend live, attend at your convenience.