Last updated on: 10/12/2019

All of my recommendations for aspiring engineers in a single place, coming from various areas of my interest. The principal scope supports data science, programming, python, math, cybersecurity, business, and productivity.

The list also aggregates and extends most of the suggestions from my blog posts, where some of the entries come from a different language (🇵🇱). Although it’s my personal list, don’t hesitate to tell me if I missed something interesting or if there is a dead link. You are also welcome to create a pull request and see the history of edits in the GitHub repo.

Tip: The catalogue is sorted chronologically, but I believe it is easier and more practical to browse this site by categories (using the TOC).

🌐 Blogs

 Collection of all the blogs for the categories below. I advise adding all the relevant sites in a news aggregator like Feedly



data science


  • Medium <— popular blogging platform
  • Reddit <— front page of the Internet (tip: browse by subreddits, not the main site)
  • Wait But Why <— great reading time guaranteed



  • Code Without Rules <— helping you become a productive programmer and get work/life balance
  • Coding Horror <— programming and human factors
  • Devstyle (🇵🇱) <— blog for every programmer
  • DEV Community <— popular blogging platform for developers
  • Discover dev <— daily digest of the best engineering blogs from across the web
  • Hacker Noon <— great stories by real tech professionals
  • Product Hunt <— discover the best new products in tech

📚 Books

 For more, visit my bookshelf on Goodreads




data science

data tools



personal development


 Mostly universal (language-independent books). 


💾 Browser Extensions

💼 Business

  • ahrefs <— research your competitors
  • Bitcoin Regret Club <— check how much would you earn/lose if you would invest into Bitcoin on the chosen date
  • BuzzSumo <— analyze what content performs best for any topic or competitor
  • Calendly <— schedule appointments
  • CoSchedule <— schedule online posts/marketing
  • Cryptowatch <— live Bitcoin price charts
  • FlatGA <— easy overview of your Google Analytics dashboard
  • Google Optimize <— free tool to perform A/B tests to analyse customers
  • <— stock market quotes & financial news
  • ODOO <— web-based open source business apps
  • Remote Work Toolkit <— set of tools for remote work
  • Sendy <— cheap newsletter system via Amazon SES
  • Startup
    • books <— list of books to help you along your startup journey
    • idea checklist <— answer before opening a startup
    • stacklist <— list of technologies used by startups
    • stages <— +90 tools for startups
    • stash <— curated directory of resources & tools to help you build your startup
  • Tools for Makers <— hand-curated directory of tools for makers

👾 Cybersecurity

  • 10 Minute Mail <— create a temporary anonymous e-mail
  • AmIUnique <— check your browser fingerprint
  • CyberChef <— web app for encryption, encoding, compression and data analysis
  • DuckDuckGo <— find what has been hidden from you by Google
  • Filecrypt <— encrypt a link
  • Firefox Send <— private file sharing up to 1GB (2.5GB with account)
  • Have I Been Pwned <— check if you have an account that has been compromised in a data breach
  • Hybrid Analysis <— analyse malware for free in the browser
  • IP Info <— check if your VPN leaks information
  • Pi-Hole <— adblock for the whole network (requires: router + raspberry pi)
  • PrivacyTools <— set of services, tools, and knowledge to protect your privacy
    • PRISM Break <— set of privacy tools (categorised by operating systems)
    • Privacy Respecting <— curated list of privacy respecting services and software
  • Shodan <— search engine of IoT
  • Tails <— privacy OS for pendrive (protects your privacy and offers all sorts of apps to do so, like Tor, Thunderbird and PGP)
  • Webbkoll <— monitor privacy-enhancing features on websites, and find out who is letting you exercise control over your privacy
  • Whois <— whois lookup
  • Your social media fingerprint <— check where you are currently logged in

📊 Data Science

 Subscribe to my newsletter to find out even more inspiring stuff to help you with your analytics! 


My private OneNote would be there, but I prefer to share only the most relevant content.



  • DataJobs <— jobs on the US market
  • Indeed <— worldwide job search
  • Kaggle jobs <— job board on Kaggle
  • LinkedIn <— social platform for employees
  • Remote Jobs <— browse 1,900+ remote companies and learn about their team, benefits, work culture and more
  • StatsJobs <— jobs for statisticians
  • Tech Interview Handbook <— carefully curated content to help you ace your next technical interview with a focus on algorithms


  • Glassdoor <— find jobs and company reviews from its employees
  • Jobscan <— optimise your resume using the ATS system
  • <— compare salaries and career levels at big companies

learning material



 As there are many, I highly encourage you to check my custom feeds: 

online tools



🎨 Design

colour palettes


  • Canva <— create graphics easily
  • Carbon <— share an image of code
  • Coggle <— generate mind maps
  • <— free online diagram software
  • Hatchful <— logo creator from the Shopify team
  • Launchaco <— free online logo maker
  • Marvel <— create mockups in the browser
  • Venngage <— infographic creator


  • Photopea <— Photoshop in the browser
  • Pixlr X <— online image editor
  • <— remove background from an image by simply uploading it


📆 Events

📰 IT News

 All the mentioned sites are mostly free of clickbait and offer overgrowth of content over the form. 

🧠 Learning


  • Duolingo <— free web/mobile app to learn most of the languages
  • Reverso Context <— translator with example sentences to give more context
  • Rosetta Stone <— learn online with a possibility to book online conversations with a native speaker
  • YouGlish <— search engine to find the pronunciation of the phrase in a YouTube video. The site offers multiple languages

online courses

  • Coursera <— courses by universities and other professional organizations
  • Courseroot <— course search engine
  • DataCamp <— online courses just for data science
  • edX <— online university-level courses
  • HN Academy <— online courses recommended by the community of Hacker News
  • Khan Academy <— free online university
  • Udacity <— high-quality courses for tech topics
  • Udemy <— find and create online courses


  • Quora <— ask anything
  • Reddit <— find the right subreddit for your question
  • Stack Exchange <— find the right site to ask your question
  • Stack Overflow <— all the programming related questions

➗ Math



  • Desmos <— graphing calculator. You can create visualisations close to 3blue1brown style (such as [1] or [2])
  • Manim <— generate explanatory animations for your math videos (created by 3blue1brown)
  • Mathway <— algebra problem solver
  • Symbolab <— step by step solver
  • WolframAlpha <— ultimate online calculator

📱 Mobile Apps

🎶 Music


  • Ableton
  • FL Studio <— my favourite choice with lots of online tutorials. Can be highly extended with multiple plugins



  • <— track your scrobbles. Make sure to follow me!
  • Radio Garden <— listen to thousands of radio stations from the world using a Google Earth based menu
  • SoundCloud <— find lots of indie music and upload your own one. Make sure to follow me!
  • Spotify <— stream music online


📧 Newsletters

  • <— scientific papers summarized in few bullet points
  • Data Science Weekly <— featuring curated news, articles and jobs related to Data Science. You can read the archive at any time
  • DEV Community <— weekly newsletter of top 7 posts (activate in settings of your account)
  • GitHub Trending Repos <— subscribe to weekly/daily sets of trending repositories from different languages
  • Hacker Newsletter <— weekly newsletter of best posts from Hacker News
  • Highbrow <— choose a topic to learn and receive a daily message
  • Inside <— daily newsletters on different topics. For example, check out Inside AI and its recent issues at any time
  • James Clear <— apply better habits in your life (from the author of Atomic Habits)
  • Podcast Notes <— summary of podcasts in few bullet points
  • unknowNews (🇵🇱) <— weekly newsletter. Check its archive or search engine for the past sendings

🎧 Podcasts

 I recommend listening to all podcasts with Pocket Casts web/mobile app



data science




  • Andrzej on Software <— software, including but not limited to Ruby, JS, OOP, DDD, CQRS, AI, business, sales, marketing
  • DevelopersHangout <— discussions of topics about coding and all that comes with it
  • Developer Tea <— short podcast for developers
  • DevTalk (🇵🇱) <— podcast for programmers
  • Retrospektywa (🇵🇱) <— talks about IT projects

⏲ Productivity

  • <— music to improve focus. Try sample sounds on their YouTube channel
    • myNoise <— background noises & interactive soundscapes
    • Noises <— free alternative to
    • Noisli <— another alternative
  • Box Breathing Exercise <— take a break, breathe and calm down
  • Effective Engineer Notes <— quick read on how to be effective and get things done
  • Feedly <— news aggregator. Save time by browsing what matters
  • Focusmate <— let others watch you while you work
  • Integromat <— automate various tasks (more advanced than IFTT and 2.5x cheaper than Zapier)
  • Leave Me Alone <— see all of your subscription emails in one place and unsubscribe from them with a single click
  • Monochrome mode (grayscale mode) activation on your mobile device <— attract yourself less to the colourless screen
  • Notion <— all-in-one workspace to replace to-do lists and note-taking apps
  • OneNote 2016 <— my favourite note-taking tool (2016 version more feature-rich over the UWP app)
    • Onetastic <— set of extensions for OneNote
  • Productivity Methods <— large list by Todoist
  • Productivity Stack <— list of productivity tools
  • Todoist <— my daily to-do app, for which I explained my setup in a past blog post
  • Toggl <— time tracker

👨‍💻 Programming

coding challenges

  • CheckiO <— learn Python or JavaScript through the online game
  • CodeSignal <— the most popular website of this kind
  • CodinGame <— <— learn programming through online sets of puzzles
  • Edabit <— simple, new website in the market
  • exercism <— 100% free service, where you submit solutions through your terminal
  • HackerRank <— my personal choice. I’ve started with included 30-days coding challenge and can totally recommend it
  • LeetCode <— more advanced website, where you will mostly find problems asked by the world’s largest tech companies. I recommend watching Kevin Naughton Jr. who goes through many problems from there


  • Anaconda <— most popular Python/R Data Science platform, which lets you install and manage all of the following tools:
  • Google Colab <— alternative to Jupyter Notebook. Run your code entirely in the browser and improve the model learning time by leveraging Google’s GPU/TPU
  • PyCharm <— more robust Python IDE
  • <— world’s leading online coding platform
  • Sublime Text <— the most optimised text editor with a package control

online tools

  • Airtable <— partly spreadsheet, partly database. Can replace WordPress for non-technical users, who can also manage multiple domains using this tool
  • Algorithm Visualiser <— interactive online platform to visualise algorithms from code
  • Bubble <— visual programming (no coding required)
  • Coda <— build docs as powerful as an app (no coding recuired)
  • ExtendsClass <— toolbox for web designers and webmasters
  • <— beautify your JSON code
  • Python Tutor <— visualise Python algorithms, step by step
  • regex101 <— online regex tester and debugger
  • StackEdit <— visual Markdown editor

websites to study from

🛫 Travel

🖥 Windows

  • 7-Zip <— file archiver with a high compression ratio
  • AIMP <— music player
  • Audacity <— simple audio editor
  • AutoHotkey <— ultimate automation scripting language for Windows
  • Calibre <— e-book manager
  • Chocolatey <— package manager
  • ConEmu <— improved windows terminal
  • Directory Opus <— ultimate file manager (worth paying for)
  • Ditto <— clipboard manager
  • Everything <— search local files instantly
  • FileZilla <— free and open-source FTP client/server
  • f.lux <— reduce the amount of blue light at night (you can also install the preferred UWP app)
  • GitKraken <— cross-platform GUI Git client
  • JDownloader <— open-source download management tool
  • KeePassXC <— cross-platform password manager. Otherwise, consider 1Password as the most secure online manager
  • Mp3tag <— mp3 tag editor
  • Ninite <— install and update all your programs at once
  • PDF-XChange Editor <— most feature-rich PDF viewer/editor
  • <— full-featured portable software system
  • Potplayer <— video player
  • PowerToys <— Windows system utilities to maximize productivity. FancyZones is one of them, which improves window layout management
  • PuTTY <— SSH and telnet client
  • qBittorrent <— open-source torrent manager
  • ShareX <— most feature-rich screen capture tool

✍ Writing/Research


  • Awesome LaTeX <— list of LaTeX resources
  • Mathpix Snip <— convert images to LaTeX by capturing your screen
  • Overleaf <— online LaTeX editor, recommended not only for the beginners

research websites

📼 YouTube Channels

data science




  • Akademia Bogactwa (🇵🇱) <— daily vlog of Polish entrepreneur focused on real estate
  • Andrzej Krzywda (🇵🇱) <— daily vlog of Polish programmer/entrepreneur
  • Charisma on Command <— master your charisma
  • Devstyle (🇵🇱) <— daily vlog of Polish entrepreneur (past programmer)
  • FightMediocrity <— summaries of the most inspiring books
  • MiroBurn (🇵🇱) <— daily vlog of Polish entrepreneur focused on online courses, biohacking, motivating others and establishing new companies
  • Wojna Idei (🇵🇱) <— psychology, philosophy, sociology and culture



tech news

  • Dave Lee <— critical reviews of the newest tech on the market
  • Linus <— entertaining tech explanations
  • Techquickie <— humorous answers to tech questions

🤷 Other