https://dnsexit.com (inestable-potser en ocasions no és accessible) (NO permet modificar els servidors de noms: Route53/Cloudflare)
https://www.dynu.com (nota1: els registres TXT i MX sols per dominis de més de 30 dies: solució-> 1er dia de classe!!)
(nota2: és possible crear el certificat sense esperar els 30 dies via acme.sh i la api key del compte de dynu)
https://www.duckdns.org/ (no permet crear registres TXT/MX; o al menys de manera senzilla)
https://www.noip.com/
https://bitwarden.com/password-generator/
https://passwordsgenerator.net/
https://vclock.com/
https://e.ggtimer.com/60
https://ubuntuhandbook.org/index.php/2021/02/start-drawing-on-screen-ubuntu-2004
https://openboard.ch/index.en.html
firefox marker
https://sli.dev/
https://github.com/FormidableLabs/spectacle
presentacions en pdf - pdfpc
https://excalidraw.com/
https://beta.tldraw.com/
https://wbo.ophir.dev/
https://www.diagrams.net/
https://d2lang.com/
https://play.d2lang.com/
https://mermaid.live/
simple screen recorder
obs
chrome extension - screenity
gpu screen recorder - app
togif - gifcap
complement OBS - vdo.ninja
https://meet.google.com
https://app.screego.net/
https://tmate.io/
https://github.com/yudai/gotty
https://www.teleconsole.com/
https://maildrop.cc/
https://mail.tm/en
best of bread > 12 feet
now dead >> https://outline.com/
untested >> https://github.com/iamadamdev/bypass-paywalls-chrome
https://www.ventoy.net/en/index.html
… and network multiboot
https://netboot.xyz/
https://netsim-tools.readthedocs.io/en/latest/index.html
https://docs.oracle.com/learn/
azure for students
https://render.com/
docker playground
ubuntu i altres - killercoda - (katacoda replacement)
ubuntu 20.04 - katacoda - now pay only access (fins el 15 de juny de 2022)
red hat enterprise
https://goteleport.com/labs/
iximiuz - 2h/dia
playground seguretat
last resource - onworks - short timer
https://gohugo.io/hosting-and-deployment/
https://dnschecker.org/all-tools.php
https://snapdrop.net/
https://www.sharedrop.io/
https://github.com/magic-wormhole/magic-wormhole
https://github.com/schollz/croc
https://wormhole.app/
https://fromsmash.com
https://transfer.sh/
https://etherpad.opendev.org/
https://ethercalc.net/
https://cryptpad.fr/
https://framasoft.org/ca/full
https://www.cloudflare.com/es-es/products/tunnel/
[opera browser vpn]
https://blog.tonari.no/introducing-innernet
https://www.netmaker.org/
https://docs.linuxserver.io/general/awesome-lsio
https://www.termcat.cat/ca
https://www.softcatala.org/
elest.io
https://www.pikapods.com/