TL:DR; 100% managed version of ZLIB compression library.
100% managed version of ZLIB compression library. Full C# source code is included.
ZipForge.NET is a fast and powerful Zip component for .NET. It lets you easily integrate ZIP compression support into your C# or VB.NET applications. ZipForge.NET features include strong AES encryption, Unicode filenames, SFX and much more.
The PDF reader and parser library is especially efficient in extracting text using whitespace support formatting, formatting, Unicode and UTF-8 character reading. Reading a PDF can be a challenging task in C#.
Docotic.Pdf is a .NET PDF library for reading and writing PDF documents. You can also modify PDF documents, merge PDF files, add images to PDF, extract PDF text, password-protect PDF files, add PDF annotations. Create PDF/A files.