
LeetCode (https://leetcode.com/): A go-to platform for practicing coding problems and preparing for technical interviews. You’ll find thousands of challenges across algorithms, data structures, and systems design — with test cases and community discussions to help you level up your problem-solving skills.
GeeksforGeeks (https://www.geeksforgeeks.org/): A huge online computer science hub packed with tutorials, explanations, and examples on coding concepts. It’s great for learning fundamentals, diving deep into topics, and finding solutions for common programming patterns in languages like C++, Java, Python, and more.
Kaggle (https://www.kaggle.com/): A vibrant data science and machine learning community where you can find real datasets, compete in predictive modeling challenges, build projects, and share notebooks. It’s perfect for hands-on learning and collaboration with other data enthusiasts.
Code.org (https://code.org/en-US): An education nonprofit focused on expanding access to computer science, especially for beginners and students. It offers fun, structured lessons, games, and activities to learn coding basics — no experience required.
Khan Academy — https://www.khanacademy.org/
A free, nonprofit online learning platform offering video lessons and practice exercises across core subjects like math, science, history, and computing — great for self-paced foundational learning at any age.
Udemy — https://www.udemy.com/
A huge online course marketplace where experts create video-based classes on everything from programming and business to creative skills — courses can be paid or free.
Harvard Online — https://pll.harvard.edu/online-courses
Harvard University’s official hub for online courses, including professional, academic, and skills-based training created by Harvard faculty — often with certificates.
Class Central — https://www.classcentral.com/
A search and discovery engine for online courses (MOOCs) from universities and providers like Coursera, edX, and more — helpful for finding free and paid options.
Coursera for Business — https://www.coursera.org/business
Enterprise-focused learning from top universities and companies — builds career and leadership skills with scalable training paths and certificates.
Google Skillshop — https://skillshop.withgoogle.com/
Google’s official training platform to master Google products like Analytics, Ads, and more — includes certifications for professionals and marketers.
MindTools — https://www.mindtools.com/
Professional development site with practical resources on leadership, time management, communication, and team skills (usually subscription-based).
openSAP — https://open.sap.com/
Free online courses on SAP technologies and enterprise software — ideal for IT professionals and business tech learners.
Learning OpenAI – Learning (At the moment there’s no official centralized “OpenAI Learning” site in the same way; many resources are hosted through ChatGPT’s tools and documentation.)
Microsoft AI Learn — https://learn.microsoft.com/ai Microsoft’s official AI learning hub — hands-on tutorials, learning paths, and documentation for developing AI skills with Microsoft tools. Microsoft Learn
Hugging Face Learn — https://huggingface.co/learn A learning section from Hugging Face focused on open-source AI model development, LLMs, and practical machine learning training. Hugging Face
TensorFlow — https://www.tensorflow.org/learn Official learning resources for TensorFlow (Google’s ML framework) — tutorials and courses on neural networks, model building, and deep learning.
Domestika — https://www.domestika.org/
Creative community and course platform with highly produced training in design, illustration, photography, and craft skills.
Behance — https://www.behance.net/
Adobe’s showcase platform where creatives share portfolios — great for inspiration and discovering top design work.
Blender Guru — https://www.blenderguru.com/
One of the most popular Blender tutorials and resources hubs — ideal for learning 3D modeling and animation.
Bitfountain — https://bitfountain.io/courses/
Tech and coding tutorials, especially for mobile and web development — focused on hands-on skill building.
Babbel — https://www.babbel.com/ Paid language learning platform with structured lessons that build vocabulary and grammar step by step.
Busuu — https://www.busuu.com/ Social language learning with practice and interaction — includes community feedback and personalized plans.
HelloTalk — https://www.hellotalk.com/ Conversational language learning via text and voice chat with native speakers worldwide.
Duolingo — https://www.duolingo.com/ Gamified, beginner-friendly language learning app that makes daily practice fun and habit-forming.
Highbrow — https://www.highbrow.com/ Micro-learning platform that sends short, daily lessons straight to your inbox on topics like productivity, creativity, or business.
Calm — https://www.calm.com/ Wellness app focused on meditation, sleep stories, and mindfulness practices for mental well-being.
Authentic Happiness (University of Pennsylvania) — https://www.authentichappiness.org/ A classic research-driven resource from one of the places where positive psychology began, with surveys and readings about happiness and strengths
Mindvalley https://www.mindvalley.com/ – Mindvalley is a personal growth and lifelong learning platform that combines science-informed techniques with transformational coaching — covering mindset, productivity, relationships, health, and purpose.
🎓 Online Learning & Skill Development
Coursera — https://www.coursera.org/ A major online learning platform offering structured courses, specializations, and professional certificates from top universities and companies — great for career-advancing skills in tech, business, and beyond.
HubSpot Academy — https://academy.hubspot.com/ Free online training in inbound marketing, sales, customer service, and CRM tools — with certifications that are widely recognized in the industry. HubSpot Academy
Toastmasters — https://www.toastmasters.org/ A global nonprofit focused on building public speaking and leadership skills through regular club meetings and structured learning pathways
Moz Academy — https://academy.moz.com/ SEO training and certification courses from Moz, covering fundamentals like keyword research and search engine visibility.