Robinhood - Free stock trading service.
Republic - Where everyone can invest in startups & tokens
Alpaca Fractional Trading API - Commission-free API to trade & invest for as little as $1
Netcapital - Replace venture capital with community capital
Stonksfolio - Gain insight into the performance of stock & ETF investments
Wefunder - The law changed. Invest $100+ in startups you love.