UDP Sender is a simple application to allow sending UDP packets either directly or, as I use it, by acting as a plugin for Tasker/Locale.
Download App from https://play.google.com/store/apps/details?id=com....
It is completely free, no ads are used. Please do rate/review it if you find it useful.
If you encounter any Issues please log them on Github (via https://github.com/hastarin/android-udpsender/issues) rather than giving poor reviews!
For apps not supporting the Tasker/Locale plugin format you can use an implicit IntentIntent.ACTION_SENDTO with a udp://host:port/data format URI to send packets.