Contributed a review of CentOS: Mostly stable and has a free community version but could be even more stable

Contributed a review of Mellanox Switches: Stable, easy to use, and offers a unique RDMA feature

Contributed a review of MariaDB: Simple to setup and stable with high availability

Contributed a review of Cisco Catalyst Switches: Easy to configure, scalable, and stable

Contributed a review of Ubuntu Linux: Open-source, easy to use, and very stable