Ephedrine is still available combined with guiafenesin available to buy just as you would pseudoephedrine.
OTC aids are mostly combos of herbs, vitamins, and amino acids that arent very effective (maybe EGCG from green tea is ok) and not fun at all like ephedra. I believe orlistat is still available OTC (Alli) and by rx (Xenical) but have pretty nasty GI side effects.
Other rx ones include Contrave (buproprion/naltrexone), Qsymia (phentermine/topiramate) and the little used Didrex (benzphetamine). Oh and the new racemic amp, Evekeo is indicated for weight loss. Probably missing some oddballs but cant remember.