If you’re looking to give money towards reformed charities that are preaching the Gospel around the world, here are some I recommend.
Probably best known for its founder, Paul Washer, HeartCry Missionary society equips and sends missionaries around the world.
Desiring God was founded by John Piper, and has touched tens of millions of people around the world. As a web developer, their website is my favorite.
An international family of churches that exist to glorify God by planting, strengthening, and multiplying Great Commission Churches around the world.