Enveloupe - Send snail mail in three clicks.
Coinramp - The Coinramp Card lets you spend over 10+ cryptocurrencies like cash, online, in-stores and ATM withdrawals. Available in 100+ countries, no ID needed. Anonymous Crypto Cards
Felt for iPhone - Handwritten cards for the modern world
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.
Skip The Stamps - Snap or upload a pic to send a physical postcard in minutes
PST.NET - Virtual payment cards for online shopping and advertising