Easy Compression Library is a very easy-to-use replacement of TFileStream, TMemoryStream and other TStream descendants to their analogues with compression/decompression and encryption. Compression is transparent, all the methods, properties and behavior of TFileStream and TMemoryStream are supported, so it is very simple to replace them in the application code.
Easy Compression Library does not support multi-file archives. If you need to compress multiple files to a single archive file try FlexCompress or ZipForge.
Current version: 5.40
Released: May 15, 2014
Price: $ 199
Component Ace is all that it advertises. It is easy to implement and is very fast.
In addition, the customer support is the best I have ever had. All my questions were answered within hours, often immediately. The responses also answered my questions, no need for followup emails.
If your application needs the functionality that Component Ace provides, search no further.