The SMTPClient component from Bossware is a .NET SMTP client that allows developers to implement outgoing email functions for their email applications and Web pages. It does not use the .NET Framework's System.Web.Mail namespace, which is merely a wrapper for CDONTS and CDOSYS, and which is reputed to be resource-hungry and to behave differently depending on the OS of the computer. The component is written in 100% managed C# and is CLS compliant.

Zlib is a free general-purpose data-compression library. Integrity checks performed with the CRC-32 or the ADLER 32 checksums. In-memory operations use the zlib compressed data format (RFC 1950). Deflate (RFC 1951) is used for its compression algorithm. Typical compression ratios are between 2:1 and 5:1. The gzip format, RFC 1952, is supported for compressing files on a file system. Lacks support for PKZip 4.5, BZip2, and Deflate64.

A security toolkit letting even less experienced programmers add encryption and authentication services to their apps, features that are becoming indispensable. The library hides low-level details of security from developers. It supports a variety of algorithms for symmetric/asymmetric encryption, authentication, and hashing. The library is free for non-commercial/shareware projects. It is written in C. ActiveX and C++ wrappers are available.