NetMonster - NetMonster is a networking app by Michal Mrocek that comes up with features to enable you to get detailed information about your current network right on your mobile phone screen.
Network Analyzer - Network Analyzer app lets users discover new high-speed WiFi networks to connect to them and download files of big sizes in a matter of seconds.
Cell Signal Monitor - Cell Signal Monitor is an advanced network monitor that helps you to watch the state of cellular network by gathering data about cell towers. The app supports GSM, UMTS and LTE networks. There is a Free edition with adds.
Fastah 4G Finder - Fastah 4G Finder app contains features through which you can access a color map to get an idea about the speed of the internet on your current network.
tPacketCapture - tPacketCapture is packet capture app. It captures packets without using any root permissions. It uses VpnService provided by Android OS.
Mojo Packets - Wireless Troubleshooting Made Easy