Overleaf - The online platform for scientific writing. Overleaf is free: start writing now with one click. No sign-up required. Great on your iPad.
Coinbase - Bitcoin, safe and easy.
TeXworks - The TeXworks project is an effort to build a simple TeX front-end program (working environment)...
Binance - Cryptocurrencies exchange platform
Fidus Writer - Fidus Writer is an online collaborative LaTeX editor especially made for academics who need to use...
Poloniex - US-based cryptocurrency exchange with maximum security