Front End Code
https://developer.mozilla.org/en-US/
HTML 5 Content Model
https://www.w3.org/TR/2011/WD-html5-20110525/content-models.html
CSS Properties List
https://www.w3.org/Style/CSS/all-properties#list
https://meiert.com/en/indices/css-properties/
CSS References
https://tympanus.net/codrops/css_reference/
CSS Zen Garden
http://www.csszengarden.com/
http://www.mezzoblue.com/zengarden/alldesigns/
Node.js
https://nodejs.org/en/
webpack
https://webpack.js.org/
gulp.js
https://gulpjs.com/
GitLab
https://about.gitlab.com/
TravisCI
https://github.com/travis-ci/travis-ci
Python
https://www.python.org
Jupyter Notebook
https://jupyter.org/
R Studio
https://rstudio.com
Tableau
https://www.tableau.com
ProxMox
https://www.proxmox.com/en/
Design Services
https://www.crowdspring.com
https://99designs.com
Photoshop Express
https://apps.apple.com/us/app/photoshop-express-photo-editor/id331975235
Adobe Express
https://www.adobe.com/express/create
Canva
https://www.canva.com/
SEO Meta Generator
https://www.seoptimer.com/meta-tag-generator
http://tools.seobook.com/meta-medic/
SEO Toolset
https://moz.com/
SEO and Web Crawler
https://www.screamingfrog.co.uk/seo-spider/
Structured Data (schema markup) in HTML
https://wordpress.org/plugins/schema-app-structured-data-for-schemaorg/
schema.org
For the syntax of content to help Search Engines semantic understanding
PageSpeed Insights
https://developers.google.com/speed/pagespeed/insights/
Missing SSL
https://www.whynopadlock.com/
Website Speed Performance
GTmetrix
https://gtmetrix.com/
Mobile Friendly Testing
https://search.google.com/test/mobile-friendly
CLI – Speed Test
https://www.speedtest.net/
https://fast.com/
Marketo
https://www.marketo.com/
Hubspot
https://www.hubspot.com/
ActiveCampaign
https://www.activecampaign.com/
Content Concepts
https://issuu.com/
Content Ideas
https://answerthepublic.com/
https://keywordseverywhere.com/
Saas and Subscription Analytics
ChartMogul
https://chartmogul.com/
Subscription Business Model Analytics
baremetrics
https://baremetrics.com/
All-in-one Marketing Analytics
Cyfe
https://www.cyfe.com/
Brand Ads Analytics
Moat.com
https://moat.com
Conversion Optimization / Measure Visitor Behavior
Freshworks
https://www.freshworks.com/marketing-automation/conversion-rate-optimization/
Social Share and Reach
https://www.shareaholic.com/
Social Media Management
https://promorepublic.com/en/
TweetDeck
https://tweetdeck.twitter.com/
Hootesuite
https://hootsuite.com/
Buffer
https://buffer.com/
