Banis
You can read Guru Granth Sahib Ji, Sri Dasam Granth, Nitnem, Sukhmani Sahib and many other Banis with English & Punjabi Translation. App has facility to search Shabads as well.
Audio
LIsten Live from Sri Darbar Sahib and from many other Kirtan Radio Stations which includes Hukamnama, Katha, Waheguru Simran, Rozana Shabad, Nitnem Banis etc.