You'll want a microplane style zester rather than one that peels off large pieces of zest, because you don't want large chunks of peel in your lovely, smooth lemon curd.
Some doo - dads that you can consider if budget allows and depending on your style of cooking: garlic press, pastry cutter, melon baller, ice cream scoop, egg separator, zester, cookie cutters, potato peeler, apple corer and mini-food processor.