Brief Answer:
Synthroid,Thyrax,Euthyrox,Levoxyl,
Levothroid,
Detailed Answer:
Hi, Thanks for writing back.
Cytomel 25 mcg is T3 hormone. The dose need to be adjusted based on your response. If you tolerate this you can continue the same. In our body T4 converts to T3 and act on all the tissue. So since you are taking T3 then no need for T4 supplementation or Iodine.
Those drugs I mentioned are from different companies with different trade name. I usually prefer eltroxin or 
thyronorm. The drugs you used like snthyroid, armour, are also very known drugs for 
hypothyroidism. Since you are allergic to them I searched only for you from my drug update. These drugs (Eltroxin, thyronorm) are T4 hormones and will get convert to T3 before acting.
There are lot of generics of 
thyroxine in market. So you can check them with the pharmacist and can select the one that suits you. The list of the generics are also available in internet and in drug update. You can also get help from them. 
Some of the names(brands) available Internationally are- Synthroid, Thyrax, Euthyrox, Levoxyl, Levothroid, Levaxin, L-Thyroxine, Eltroxin and Thyrox.
Hope this helps you.
Regards