Pop filters: Usually contained in studios. Pop filters are used to soften explosive consonants.
Omni directional microphone: A Omni directional microphone allows sound to be recorded from all directions. This is good to use especially when recording an outside broadcast.
Unidirectional microphone: Allows you to record from a pacific area.
Microphone sponge: To reduce interfering sounds (i.e. blowing of wind, other people talking in the street etc).