Hello,
I've built both web applications and Qt based applications on the Pi.
I have done many projects with Raspberry Pi including home automation, video surveillance, media center add-ons. Among the hardware I've used with it are EnOcean devices, GrovePi sensors, HAT boards (GrovePi, SenseHAT, UnicornHAT, PiFace relay), picamera, magnetic card readers, Modbus devices, servo motors and many others.
I've also configured the Pi to boot into a full screen kiosk Chromium browser to display a locally hosted webpage.
Best wishes,
iticus