From KLP Micro Systems:
WiFi Linker Lite by KLP Micro Systems is a basic free WiFi scanner & connector application targeted to run on Android devices running OS version 2.2 (API Level 8) and above.
Scans the WiFi networks in the detectable range;
Functions as WiFi Connection Manager;
Gives detailed information about the detected WiFi access points;
Connects to the selected access point on a button click;
Free from advertisements.
Requires permission for accessing WiFi interface and WiFi network states.