User:Jukeboksi/Useful sites

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This is User:Jukeboksi's list of useful sites

Sysadmin

GTmetrix.com is a website speed analysis service that offers many analyses and a wealth of information and tips on how you can improve your website's speed.
SSL Test, a service by Qualys SSL Labs. Reveals a lot of information about SSL/TLS certificates. Truly useful when installing SSL/TLS encryption.
https://www.giftofspeed.com/ - website speed test
https://builtwith.com/ - shows you what a website is using for technologies.

Wiki

https://www.tablesgenerator.com/mediawiki_tables

Learn to use computers

A compact list of some useful command line (cli) commands @ PixelBeat.org

Lists and directories of free software

The community edited Free Software Directory, an effort by FSF.org
Kickball's Awesome list of free software you can host yourself @ GitHub.com