All of the downtown restaurants are moderately priced. A good option for vegetarians/vegans is the Green Earth Cafe at the Blue Moon Market, on Clifford Street off of Water Street.
In addition to the Blue Moon, the Green Bean and The Loaf & Ladle offer good homemade soup and sandwich options.
For casual dining try Margaritas Mexican, Pad Thai Thai, or the Pine Garden on Route 108. For finer dining try 11 Water Street, Taverne at River's Edge, or The Exeter Inn. The Town Line Grill on Route 27 High Street also offers top notch fare in a semi-casual setting.