A/C Pro ACP-100
One of the best-selling A/C recharge kits on the market. It contains acid eliminator. The dispenser is reusable and comes with a pressure gauge. It also has a temperature dial so that you can charge your A/C accordingly to the outside temperature.
Interdynamics MAC-134 EZ Chill Refrigerant Refill
ID has been around for a long time. This refill kit not only has a charging hose and gauge but it also contains stop leak. It is supposed to stop slow R134a leaks.
DuPont Suva A/C Automotive Refrigerant/Freon R134a
DuPont invented this stuff. It meets AHRI-700 and SAE J2776 Purity Standards. If you are looking for plain A/C refiregerant with no stop peak and dye DuPont is a good bet.
If you have a large A/C leak, none of these kits would work as you will loose freon very quickly. If you have a significant freon leak, a charge won't last more than a few days or even a few hours in some cases.