I have a Samsung Galaxy Tablet but my charger is a little broken. It only charges if I play around with it but that frustrates me. Is there any other way I can charge my tablet without wasting money? Can I plug it in an Apple computer or Dell?
The charger needs to output at least 2A to charge.
While by default USB ports don't output that much, Asus has a bit of software called AI Charger that should let you charge off some USB ports. Lifehacker reports it works on other motherboards and some Android devices.
However in the long run, getting the charger is a much better idea. You can use it on other devices (like future tablets!), and you're not tricking your desktop or laptop into doing something it normally does not do.
I ran into a similar situation, I just bought a USB wall charger. This way you can charge your IPod, tablet or whatever all from the same USB socket.
As Izzy stated in the comments, you can always just plug it into your computer as well.
I wouldn't buy one online, just go to Walmart (or your Walmart equivalent). Almost all cell phone stores carry them as well, but they sometimes charge more for them.