WyFy

Write a wifi network name (SSID) and password to a NFC tag. Tap such a tag to automatically connect to that network.

Totally free app. No ads, no notification bar spam.

Uses the zxing library for encoding QR codes:

http://code.google.com/p/zxing/

Permissions:

* NFC to read and write tags

* ACCESS_WIFI_STATE to populate SSID and security fields when app is launched

* CHANGE_WIFI_STATE to connect to a network when a tag is scanned