https://ironsoftware.com/csharp/ppt/
C# PowerPoint Library (Without Using Office Interop) | IronPPT
The C# PowerPoint Library. Edit PowerPoint presentations in .NET applications without using Interop. Supports .NET Framework.
library without usingcinterop
https://ironsoftware.com/python/excel/
Python Excel Library (Without Using Interop) | IronXL for Python
The Python Excel Spreadsheet Library. Read and Write Excel documents in Python Applications. Supports .NET Core and .NET Framework.
library without usingpython