OpenSSL - OpenSSL is a free and open source software cryptography library that implements both the Secure Sockets Layer (SSL) and the Transport Layer Security (TLS) protocols, which are primarily used to provide secure communications between web browsers and …

Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.

Let's Encrypt - Let’s Encrypt is a free, automated, and open certificate authority brought to you by the Internet Security Research Group (ISRG).

memcached - High-performance, distributed memory object caching system

Authy - Best rated Two-Factor Authentication smartphone app for consumers, simplest 2fa Rest API for developers and a strong authentication platform for the enterprise.

Aerospike - Aerospike is a high-performing NoSQL database supporting high transaction volumes with low latency.