Apps like Packet Injection

Here are some great alternatives to Packet Injection by Andro Softs - What Else ? :
UDP Guard
UDP Guard
★4.4
NetPal - netcat for Android
NetPal - netcat for Android
★4.3
UDP/TCP Widget
UDP/TCP Widget
★4.9
UDP TCP Server
UDP TCP Server
★3.9
TCP Telnet Terminal
TCP Telnet Terminal
★4.3
iPerf2 for Android
iPerf2 for Android
★3.8
Network Utilities
Network Utilities
★4.6
Knock on Ports
Knock on Ports
★4.6
TCP UDP Server & Client
TCP UDP Server & Client
★4.5
UDP Sender / Receiver
UDP Sender / Receiver
★3.3
TeslaModbusSCADA
TeslaModbusSCADA
★4.3
Net Tools (AdS)
Net Tools (AdS)
★4.1
Advanced PortChecker
Advanced PortChecker
★4.3
Mocha Ping Lite
Mocha Ping Lite
★3.9
Nmap Tools- Port Hacking Guide
Nmap Tools- Port Hacking Guide
★3.9
UDP Terminal
UDP Terminal
★3.9