If popping tags is your passion, prepare to be obsessed. Discover bargains on clothes, accessories and housewares at Boomerangs’ Jamaica Plain, West Roxbury and Central Square locations, all of which boast enticing window displays, well-organized finds and nary a whiff of mothballs. And the special-edition store in the South End is as trendy as any Newbury Street consignment shop, with Brooks Brothers, Balenciaga and Marni. Best of all? All proceeds support the work of AIDS Action Committee of Massachusetts.