Celestial Cafe in Exeter is solid and probably underappreciated / less known.

Pasquale's is also great for the pasta and pizza as someone else already mentioned.

Rathskeller in Charlestown isn't gonna blow you away but solid bar food and nice homemade chips. Heavy pours on the cocktails too most times and I've always had good service there. Probably not worth the trip down from PVD for given it's not offering anything amazingly unique but its a good spot for a burger. The fried fish sandwich is excellent btw, perfectly fried every time I've had it.

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Back 40 in Exeter is also solid gastro-pub with some upscale bar food selection. Good cocktail and beer selection and its a big spacious clean space as well.