DelphiZlib - Version 0.2.0 The DelphiZlib package contains a TGzip, TCrc32 and TAdler32 component. Now you can add GZip, Gunzip, Crc32 and Adler32 functionality to your programs. The code uses the Zlib library and is therefore free from any licences. No dll's are needed. Note that this package used to be called DelphiGzip.