TL:DR; 100% managed version of ZLIB compression library.
100% managed version of ZLIB compression library. Full C# source code is included.
.NET native component that adds sounds recording, sound analysis and CD ripping to DJ and multimedia applications. Supports recording/encoding in several audio formats
PrPages - a developer module royalty free! Helps to calculate printing costs while analyzing pdf-pages regarding dimensions and used colours or b/w for single pdf-files or complete paths. It works with all programming languages in all 32-/64-bit-sys.
VintaSoft Twain .NET SDK is the professional TWAIN scanning library for acquiring images from scanner or camera. SDK allows get a list of TWAIN devices, get information about device capabilities, acquire images from device with or w/o device UI etc.