docConversionAPI

docConversionAPI is a REST API to convert documents in the cloud This API helps in converting word, excel, PowerPoint, HTML, PDF and image formats with simplicity. This is a great product with fair, predictable and affordable pricing.  

LiveSlides browser API

LiveSlides enables users to embed any website seamlessly in PowerPoint and Keynote slides. LiveSlides browser user agent will assist you in creating a server that optimizes content to capture analytics on how people are viewing your content in presentations.