Marvin Tan Network Engineer • Open Source Lover

Useful Sites

#notes Apr 23, 2019 3 min
Table of Contents:

I made this page to list websites/apps I use from time to time. This will serve as my personal reference in the future. I will continue to add more sites here along the way.


  • San Bernardino Valley College: IP Subnet Practice Page - Practice IP subnetting
  • PacketLife - Jeremy Stretch’s Blog site. Great site for studying networking.
  • GNS3 - Graphical Network Simulator-3 is a network software emulator first released in 2008. It allows the combination of virtual and real devices, used to simulate complex networks. It uses Dynamips emulation software to simulate Cisco IOS.
  • - Free online diagram software for making flowcharts, process diagrams, org charts, UML, ER and network diagrams.

Web Design

  • W3Schools - Educational website for learning web technologies online.
  • Flaticon - Thousands of free icons in the largest database of free vector icons!
  • Font Awesome - Font and icon toolkit based on CSS and LESS.
  • RealFaviconGenerator - Favicon Generator. For real.
  • SEO Web Page Analyzer - Check out your pages for search engine optimisation
  • W3C CSS Validation Service - CSS Validation Service
  • WebPagetest - Run a free website speed test from around the globe using real browsers at consumer connection speeds with detailed optimization recommendations.
  • Google PageSpeed Insights - Make your web pages fast on all devices
  • Test My Site - Think with Google - See how your mobile site speed ranks compared to other top brands and learn how you can provide a faster, more frictionless mobile experience.
  • Google Mobile-Friendly Test - Test how easily a visitor can use your page on a mobile device.
  • Google Search Console - Improve your performance on Google Search
  • Speedtest by Ookla - Test your Internet connection bandwidth to locations around the world with this interactive broadband speed test from Ookla.
  • - Super fast and easy Social Media Sharing Buttons. No JavaScript. No tracking.
  • Namecheap - My fave ICANN accredited registrar
  • Netlify - Deploy modern static websites with Netlify. Get CDN, Continuous deployment, 1-click HTTPS, and all the services you need.
  • Forestry CMS - Sync your Jekyll, Hugo or VuePress site.
  • Atom - A hackable text editor for the 21st Century
  • Twitter Card Validator - Validate Twitter card meta
  • Facebook Sharing Debugger - Sharing Debugger lets you preview how your content will look when it’s shared to Facebook and debug any issues with your Open Graph tags.


  • Unsplash - Beautiful, free photos. Gifted by the world’s most generous community of photographers.
  • OBS Studio - Free and open source software for video recording and live streaming.
  • EZGIF - Free, simple to use toolset designed primarily for creating and editing animated GIFs
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