Description: Oppia is an open-source learning platform that allows users to create interactive online lessons called 'explorations'. It features a visual editor for building engaging content like quizzes, simulations, and feedback.
Type: software
Pricing: Open Source
Description: Pdfcrowd is a PDF creation and conversion API that allows developers to convert HTML, URLs, and office documents to PDF from their applications. It handles file uploads and conversions on the cloud through REST API calls.
Type: software
Pricing: Freemium