Also Dymetradine 25. I think they were only $10 for 100 tabs. Practically everyone in gym was hooked on those in the early/mid 90's. My training partner abused it and he had heart problems later in life. I was always afraid of that stuff. I didn't even use caffeine for a pre-workout booster until around 2003.
ECA stacks used to power my workouts like crazy. I used to get a huge bump in strength and stamina from taking it. But after a while i could tell it was taking a toll on me, i don't use any stimulants anymore, maybe drink a cup or two of coffee in the morning.
Ephedra and Ephedrine, man i've taken so much of that stuff. Ephedra was like tuning your heart into a speed bag, not very good for you.

I used to take Bronkaid and Caffeine 3 times a day for extended periods of time. No thanks anymore.
Provigil is good too, but mainly because it's an appetite suppressant and gives you insane focus. Just have to take small doses, it has a long half life. When i worked 16 hour shifts in the oil field, i took Provi every morning, gives you a good kick in the ass and doesn't drop you or make you feel cracked out like other stimulants.
Keto never was good for me, it made me feel like shit and my workouts suffered. There is absolutely no reason for the average lifter to suffer in order to get lean. Just decrease your calories slowly and you will get there. It is very effective at dropping fat, but unless you are a real bodybuilder, i'll pass.
Intermittent fasting is a great choice, but again you have to want to go through this lifestyle, not something i recommend.
A calorie is a calorie as far as a unit of measure, but you won't see me eating cupcakes and twinkies. I've learned to enjoy healthy food and would rather eat a nice ribeye steak than pizza. You can get lean eating junk food, as long as your calories are severely restricted. Just makes more sense to eat healthy food, lots of veggies, fruits, beans and lentils. Plus i don't want to be a diabetic, so i follow a strict diet; however if i want to go out to eat and chow on some Mexican food or Italian, i'll do it once a week or so.
Leanest i've ever been was after 4 months of intermittent fasting, even dropped my calories down to 1200 a day for 6 weeks. I was ripped as hell, had veins in my abs and looked chiseled. My face looked 10 years younger, i lost so much weight people thought i was sick. Once i upped to calories again and ate somewhat normally, i looked amazing, but i gained back 10 pounds very quickly.