SkyblueMolly
Bluelighter
AMP citrate (4 amino-2-Methylpentane citrate)
I find caffeine to be very crappy and AMP citrate isn't that much better. Nearly nothing beats DMAA(Dimethylamylamine). I find AMP citrate to be weak.
Stimulant level(strongest to weakest)
Amphetamine, Ephedrine, Phenylpropanolamine, Dimethylamylamine, Dimethylbutylamine(4-amino-2-Methylpentane), caffeine