Jugaad
RadaeePDF SDK is a great PDF rendering and manipulation tool for developers. If you develop mobile or desktop applications the RadaeePDF SDK framework is the "Swiss Army knife" to handle PDF files. More than 6,000 applications are running the SDK on Android, iOS and Microsoft Windows UWP.
Big Faceless Organization (BFO)
Big Faceless Organization (BFO) develop Java APIs for working with PDF documents and graphs. Established in 1998, BFO has clients in over 50 different countries. Clients include, Amazon, Oracle, Siemens, VW, and Harvard University, as well as 50% of the top 30 banks in the World.
EPPlus Software
EPPlus Software AB is a Swedish software company that builds, distributes and provides support for EPPlus, a spreadsheet library for the Microsoft .NET platform with over 40 million downloads on Nuget. The development of EPPlus is done in a public repository on github, with new versions released frequently. EPPLus was asked to provide input on proposed changes to the Office Open XML standard and in 2019 Microsoft used EPPlus to demonstrate their new Blazor Web Assembly framework at various developer conferences. Thousands of companies and organizations depend on EPPlus for managing their spreadsheet data every day.