Binkd is a TCP/IP daemon which transfers files between two Fidonet systems. It supports so-called "Binkley-Style outbound", also supported by most Fidonet software. It uses its own protocol (called Binkp), but that's not a big problem, as binkd is perhaps the most popular Fidonet-over-IP technology in the former USSR.
JAMlib is a collection of subroutines that encapsulate much of the format-specific and tedious details of the JAM message base format. By using these routines, application programmers can concentrate on the higher-level issues of their programs instead of worrying about their JAM routines.
alph implements and analyzes historical and traditional ciphers and codes, such as polyalphabetic, substitutional, and mixed employing human-reconstructable algorithms. It provides a pipe filter interface in order to encrypt and decrypt block text to achieve transparency. The program is meant to be used in conjunction with external programs that transfer data, resulting in transparent encryption or decryption of information. The program can thus be used as a mail filter, IRC filter, IM filter, and so on.
RNtrack is a mail tracker/router for FidoNet-like networks. It's purpose is to process netmail on netmail hubs, though it can be useful for an ordinary node. It takes a letter, compares it with a mask and, if comparison was successful, it executes the corresponding operation with this letter. It works with popular message bases, MSG, PKT, Squish, and JAM.
BinkeyForce is an FTN mailer, a program that transmits files (netmail and echomail) between one FTN node and another. Bforce can be used to communicate over TCP/IP with the binkp protocol or with the classic FTN way of modem links. Bforce is easy to configure and has good support for FTN standards.
CrashMail II is a Fidonet tosser/scanner with a built-in AreaFix implementation, support for Binkley style outbound (BSO), and message filtering capabilities. It is a fork of Johan Billing's original CrashMail II distribution that introduces a number of fixes (primarily support for running under 64-bit Linux) and a few new features.