https://devtools.best
https://hoppscotch.io/fr/
https://explainshell.com
https://repl.it/languages/nodejs
https://htaccess.madewithlove.be

https://nooshu.github.io/blog/2019/10/02/how-to-read-a-wpt-waterfall-chart/
https://medium.com/appsflyer/10-tips-for-javascript-debugging-like-a-pro-with-console-7140027eb5f6
https://webkit.org/blog/6425/memory-debugging-with-web-inspector/
https://nolanlawson.com/2018/09/25/accurately-measuring-layout-on-the-web/
https://areknawo.com/getting-creative-with-the-console-api/

IP test
ipinfo.io/92.222.68.44

Availability/reachability probing
https://atlas.ripe.net/
http://shotsherpa.com/
https://geopeeker.com/
https://www.geoscreenshot.com/
http://ipv6-test.com/validate.php

DNS
https://www.whatsmydns.net
https://dyn.com/free-dns-test/
https://www.dotcom-tools.com/DNS-lookup-tools.aspx
http://www.dnsstuff.com/tools
https://dnschecker.org/all-tools.php

Site perf test
https://developers.google.com/speed/pagespeed
https://tools.pingdom.com/
https://latency.apex.sh/
https://gtmetrix.com/
https://www.webpagetest.org/

TLS
https://wiki.mozilla.org/Security/Server_Side_TLS
https://mozilla.github.io/server-side-tls/ssl-config-generator/
https://www.ssllabs.com/ssltest/
https://tls.imirhil.fr/https

Client tests
https://www.ssllabs.com/ssltest/viewMyClient.html # browser tls
https://speedtest.net <a href="?addtag=speedtest" title="Hashtag speedtest">#speedtest</a>

https://blog.imirhil.fr/2015/02/22/online-install-from-scratch.html
https://blog.imirhil.fr/2017/07/22/stockage-chiffre-serveur.html

SQL
https://www.mysql.fr
https://mariadb.org
http://www.postgresqlfr.org

NoSQL
https://www.rethinkdb.com
http://couchdb.apache.org
https://pouchdb.com/
https://www.elastic.co/fr/products/elasticsearch
https://redis.io

RethinkDB howtos
https://pusher.com/tutorials/live-node-rethinkdb
https://developer.ibm.com/clouddataservices/2016/09/13/real-time-qa-app-with-rethinkdb/
https://keetmalin.wixsite.com/keetmalin/single-post/2018/08/02/Building-a-Real-time-Notification-System-with-RethinkDB

CouchDB howtos
https://rethinkdb.com/faq
https://news.ycombinator.com/item?id=10688447
https://www.twilio.com/blog/2012/09/building-a-real-time-sms-voting-app-part-1-node-js-couchdb.html

File & memory
https://gun.js.org
https://github.com/techfort/LokiJS
https://github.com/agershun/alasql
https://github.com/typicaljoe/taffydb
https://github.com/louischatriot/nedb

Big Data
http://cassandra.apache.org/
http://hbase.apache.org/
http://basho.com/products/riak-kv/

Time Series
https://www.influxdata.com/time-series-platform/influxdb/

Graph (orienDB is hybrid, neo4j focuses on graph)
http://orientdb.com/
https://neo4j.com/
https://lemag.sfeir.com/transformez-vos-donnees-csv-rdf/

Comparison bt. the two and general guide on graph DBs
https://www.quora.com/Is-there-any-reason-not-to-use-OrientDB
http://info.neotechnology.com/rs/773-GON-065/images/Definitive-Guide-Graph-Databases-for-RDBMS-Developer.pdf

Frontend DBs/API
https://hasura.io
https://directus.io
https://parse.com
https://supabase.io
https://www.8base.com
https://www.kinto-storage.org
https://pouchdb.com/
https://www.apollographql.com/client/
http://www.js-data.io
https://gun.js.org
https://www.dreamfactory.com # OSS (concurrent of APIgee, Mulesoft)
http://postgrest.org
https://g-ernaelsten.developpez.com/tutoriels/PostgREST/

Next Gen Serverless
https://fauna.com/
https://hasura.io
https://realm.io

Reviews and opinions
http://blog.nahurst.com/visual-guide-to-nosql-systems
https://www.baylon-industries.com/news/?p=1942
https://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-vs-redis
http://stackoverflow.com/a/37632625/1717735
https://hashnode.com/post/what-are-the-key-advantages-of-couchdb-over-other-nosql-offerings-ciitugn9g008poy53iixsc2d1
https://stackoverflow.com/questions/45730820/sql-server-and-firebase-pouchdb-synchronization

https://www.loggly.com/blog/front-end-logging-made-easy-use-this-javascript-logger/
http://stackify.com/smarter-errors-logs-putting-data-work-2/
https://sentry.io/
https://logrocket.com/
https://www.bugsnag.com

http://www.discourse.org
https://vanillaforums.org
http://flarum.org
https://nodebb.org/

https://www.vis4.net/blog/2017/10/hello-schnack/

As a service
https://getchamp.net/
https://www.websitetoolbox.com/

iptables nf_conntrack_tcp_timeout_established

http://www.lognormal.com/blog/2012/09/27/linux-tcpip-tuning/
http://www.artiflo.net/2008/12/nf_conntrack-table-full-dropping-packet/
https://wiki.khnet.info/index.php/Conntrack_tuning

tcp window scaling

http://www.techrepublic.com/blog/linux-and-open-source/tuning-the-linux-kernel-for-more-aggressive-network-throughput/

advanced

https://access.redhat.com/solutions/30453
https://vincent.bernat.im/fr/blog/2014-tcp-time-wait-state-linux
https://blogs.dropbox.com/tech/2017/09/optimizing-web-servers-for-high-throughput-and-low-latency/

to watch (new google-developed feature)

https://www.cyberciti.biz/cloud-computing/increase-your-linux-server-internet-speed-with-tcp-bbr-congestion-control/

PUT vs PATCH (and other considerations)
http://stackoverflow.com/questions/24241893/

200 vs 201
http://stackoverflow.com/questions/1860645/

https://www.justegeek.fr/tuto-creer-raid-logiciel-mdadm-debian/