Haproxy - Reliable, High Performance TCP/HTTP Load Balancer
Seesaw - Seesaw is a Linux Virtual Server (LVS) based load balancing platform.
nginx - A high performance free open source web server powering busiest sites on the Internet.
Apache Thrift - An interface definition language and communication protocol for creating cross-language services.
Fly - Cheap Flights on your Budget
CryptPad - CryptPad is a collaborative office suite that is end-to-end encrypted and open-source.