1. iNetTools Pro (ping, trace route, DNS lookup, port scan, whois... super useful little bundle)
2. Ookla Speedtest
3. Google Authenticator, because of course
4. IT Glue for accessing things like, say, the wifi password when I'm on site. Otherwise website 5ever.
5. Chrome. I spend a lot of time researching stuff quickly on my phone while teaching my help desk how to do something.
6. Do the camera and flashlight count as an app?