R/buildapc has a large, organized list of tools. Let's build something similar for the r/sysadmin wiki? : sysadmin.
Sysadmin Wiki. Cheat Sheets. Download All (.zip) Wall Posters (36" x 24") Interior Gateway Protocols v1.0 (1 page) Protocols v2.1 (2 pages)
Privacy. Downloads & Updates. Hardware. Software Development. Web Design. Linux.