The SmartFTP FTP Library ActiveX component (COM) provides file transfer functionality for the FTP and SFTP protocol.

A professional-quality ActiveX control to convert any application into time-limited shareware. Generate serials (registration keys) to register it. Online validation on your own website to track and limit serial use. Easy to implement and flexible.

LLCryptoLib is a .NET library which allows programmers to easily add encryption, integrity and authentication services to their software. It is compatible with MS .NET and Novell Mono environments. It also provides shredding methods.

ODAC is a VCL/VCL.NET/CLX component library for fast direct access to Oracle from Delphi, C++Builder, and Kylix. Includes comprehensive support for Oracle functionality, including Oracle TAF, Advanced Queuing, and distributed transactions.

Serial Port Control is an inexpensive royalty-free component. It supports VB, VB.Net, C#, Borland Delphi, Borland Builder. Just put it on a form and you`ve got all the functionality you need to access an RS232 port.