The best free AI courses and certificates for upskilling in 2026 - and I've tried them all

I've worked with AI for decades and have a master's degree in education. Here are the top free AI courses online that I recommend - and why.
GitHub

Android OCR Text Recognition Scanner – Optical Character Recognition for Android (ML Kit, Tesseract, Cloud Vision)

Whether you want to build a document scanner, digitize receipts, or add text recognition to your mobile app, this project is a perfect starting point. This project is provided for educational and ...
Analytics Insight

Best Voice AI Frameworks to Use in 2026

Overview Leading voice AI frameworks power realistic, fast, and scalable conversational agents across enterprise, consumer, ...
GitHub

Professional machine learning application for detecting hate speech in text using Python NLP techniques.

Hate-Speech-Detection/ ├── src/ │ ├── main.py # Desktop application entry │ ├── web_app.py # Flask web interface │ ├── api.py # FastAPI REST endpoints │ ├── model.py # ML models │ ├── database.py # ...
Microsoft

Achieving Human Parity in Conversational Speech Recognition

The Switchboard-1 Telephone Speech Corpus was originally collected by Texas Instruments in 1990-91, under DARPA sponsorship, and marked the beginning of over 25 years of intensive effort in ...
IEEE

Enhancing Speech Emotion Recognition With Conditional Emotion Feature Diffusion and Progressive Interleaved Learning Strategy

Abstract: Speech emotion recognition (SER) aims to identify the speaker's emotional states in specific utterances accurately. However, existing methods still face feature confusion when attempting to ...
IEEE

Curriculum Learning aided Audio-Visual Speech Recognition with Arbitrary Speaker Number

Abstract: Recently, audio-visual speech recognition has attracted increasing attention. However, most existing works only focused on scenarios with two speakers. In this work, we study the effect of ...