Early Stage Founders Playbook - Rated 5 out of 5 by indie-hackers and techie founders who love building features and feel hesitant about marketing.
MyBrocard - Brocard allows you to create an unlimited number of virtual cards for paying for advertising and other online payments, manage a team of buyers, choose from 20+ bins for various tasks, and enjoy convenient API for integrations.
IndieEarnr - 580+ Affiliate Programs for Indie Hackers & Creators
Moon Virtual Cards - Purchase Moon Visa® Prepaid Cards with crypto. Pay at millions of online merchants with secure virtual cards.
Clever - syncing between education applications for K-12 schools
ABcard - ABcard - service allows you to issue an unlimited number of cards to pay for advertising accounts. 3 unique BINs for any work tasks, management of a team of media buyers inside a personal account and complete anonymity when paying for traffic.