Lightkey Sources Ltd is a technology company that specializes in predictive typing and text prediction software. Their primary product, Lightkey, is a Windows-based application that integrates with various platforms to enhance user productivity by predicting and correcting text in real-time. It supports multiple languages and offers features such as inline text suggestions, contextual spelling corrections, and learning from user typing habits to improve accuracy over time. The software is designed for professionals, educators, and students to streamline their writing processes.