Update README.md

Author: gereoffy

README.md

@@ -3,5 +3,5 @@ various network monitoring utilties (from ARPv4)
 
 - sniffer: ARP, DHCP, HTTP(S), UnifiAP packet sniffers
 - switch:  FDB (MAC-Port binding) data collector and processing for wide range of switch models
-- traff:   PING & RX/TX traffic data collector and visualization (TODO: add web ui too)
-  
+- traff:   PING & RX/TX traffic data collector and visualization
+- pinger:  PING monitor - periodically checks if hosts (defined in a tree) are up/down or have packet loss