Amazon Appstore - The Amazon Appstore is a place to purchase and download apps for your Android device.
Multiping - Get MultiPing Support. Network monitoring in 60 seconds. MultiPing provides a graphical view of network performance, monitors hundreds of targets, and sends automatic alerts..
Aptoide - Aptoide is a third party replacement for the traditional Google Play Store.
Fping (open source) - fping is a program to send ICMP echo probes to network hosts, similar to ping, but much better performing when pinging multiple hosts.
F-Droid - F-Droid is an interesting alternative for Android users who want to try something different and not have to use the Goole Play store all the time.
Ping Meter Gadget - Customizable, graphical, semi-transparent ping (latency) meter.