This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
You shouldn't do that if your jars have your IP. Anyone can decompile your jar and get the code out of it. If you are not worried about IP, you can read this page to get an idea of various hosting services
If open source, Maven Central is good as Jayesh suggested. If you have your own intellectual property, consider standing up a Nexus server. Then you can use a password to control access to download the jars.