Robinhood - Free stock trading service.
Tradeary - Optimize your stock, crypto and forex trading profits
Alpaca - Open links from Slack via desktop apps: Notion, Spotify, Zoom, Miro, Telegram, Airtable, Figma and VK.
Crowd Indicator - Test your trading skills and earn real money
Matador - Free investing + Social feed of trades + 2.5% on your cash
Jellifin - Trade commission-free stocks, ETFs and options.