SocksDroid
SocksDroid is an app for connecting to SOCKS5 servers. We don't run a public service ourselves, instead, we give you the app and you bring your own server. We use Android's service to route traffic from your applications to the server that you specify.
This is an updated version of the original SocksDroid by PeterCxy to support modern Android devices.
Source code is available at https://github.com/bndeff/socksdroid