Here are some of the Brave verified charity and non-profit initiatives that are out there. While there definitely are others these are just a handful that interest me personally.
codetoinspire.org [potentially no longer verified*] - Teaching women in developing countries to code, which empowers them to step into careers and be role models for the next generation of women.
pencilsofpromise.org [Uphold*] - Building schools, supporting teachers, and creating hygienic water infrastructure in developing countries.
monafoundation.org [Gemini*] - Supporting children's education and gender equality in economically disadvantaged communities.
fightforthefuture.org [Uphold*] - A collective of activists trying to ensure that technology is used as a tool for empowerment, not oppression.
watsi.org [potentially no longer verified*] - Crowdfunding life-saving medical treatments in low-income countries.
rainforestfoundation.org [Uphold*] - Saving South American rainforests through community training and advocacy.
khanacademy.org [Uphold*] - Providing free online education to everyone, at their own pace.
freecodecamp.org [Uphold*] - Free online training in many aspects of computer programming.
* Site's linked exchange - you can only tip those sites that are also linked to the same exchange as you. A site linked to a different exchange will appear unverified to you.