If you want <100mg caffeine, and a multi-ingredient product, then Clear Edge is a solid option (no caffeine), as it contains bacopa (which is solid for memory, but takes a few weeks of daily dosing to really shine), CDP-choline, and huperzine, etc. I personally use NootropiMax, which also contains the above three ingredients, but it’s ~250mg caffeine per serving. You could always split the dose, but the inclusion of theanine, bacopa, and sceletium really help keep the energy clean and focused. I’m not really sure if you want any caffeine in it, just a low amount, or no caffeine. I think that Clear Edge is sometimes hard to find in stock. Stim-free Focus XT is another solid budget option, but you may want to add some bacopa to it, as it doesn’t have any, and it’s a solid ingredient for improving memory when used daily.