A free program for Android, by MagicStudio.

Wifi Magic Key is a free Wi-Fi hotspot app that allows you to discover, and share free Wi-Fi networks with ease. It is designed to be a safe and easy way to obtain an Internet connection, no matter where you are. 

How does it work?

Wifi Magic Key lets you easily create a secure and trusted connection to a nearby Wi-Fi hotspot. By sharing the password with other users, you can access the network and surf the Internet safely. It is completely free to use, so there is no need to pay for an expensive data plan or a Wi-Fi hotspot.