Wikipedia
Ad-free and free of charge, forever. With the official Wikipedia app, you can search and explore 40+ million articles in 300+ languages, no matter where you are. 1. It's free and open. Wikipedia is the encyclopedia that anyone can edit. Articles on Wikipedia are freely licensed and the app code is open source.
Bitcoin
Bitcoin uses peer-to-peer technology to operate with no central authority or banks; managing transactions and the issuing of bitcoins is carried out collectively by the network. Bitcoin is open-source; its design is public, nobody owns or controls Bitcoin and everyone can take part. Through many of its unique properties, Bitcoin allows exciting ...