I haven't used it myself, but Yojimbo from the makers of BBEdit is worth a look based on your criteria. http://www.barebones.com/products/yojimbo http://www.ba

I haven't used it myself, but Yojimbo from the makers of BBEdit is worth a look based on your criteria. http://www.barebones.com/products/yojimbo http://www.barebones.com/products/yojimbo