Ivy is a compiler and runtime library for an extended dialect of C that checks type, memory, and concurrency safety. Ivy supports the full C language, and relies on a small number of lightweight annotations in the source code to keep time and space overheads reasonable. Ivy is implemented as a C-to-C compiler using gcc as its backend.
libmsocket is a socket abstraction library in C, which aims to support as many protocol abstractions transparently as possible. Current goals include SSL and Socks5 proxies. At its core, libmsocket makes developing socket applications very easy, even if you're not using any of those abstractions at all. It also ties in to libevent for I/O multiplexing and asynchronous DNS resolution.
Portsmith is an application-based firewall that is designed to interact with authorized users, and offers an easy-to-use browser driven interface. Portsmith's unique features include its core logic and its interface. Its logic specifies that ports are kept in a closed position until an authorized user logs into the Portsmith interface and triggers them open. When opened, the ports are only accessible from the authorized user's current IP address.
YASIS is a very detailed sysinfo script that displays individual stats or grouped info. It only requires lspci and common tools found in any distribution. Check the page for example outputs. It displays distribution/kernel, CPU count/cache/load, disk/swap/RAM used/free, network info/speed, CPU temp/fan speeds, X environment info (wm/de and display info), bandwidth speeds, and more.
Inspector is a little Python script for the Postfix mail server that helps with detection of NDR (Non Delivery Report) spam messages. It adds a watermark to every email message being sent out of the defined "mydomains", and implements a mechanism for checking for the presence and validity of such watermarks in every NDR message. It means that you can check if the NDR message is valid or not (i.e. it is NDR spam).
libpwstor is a library implementing a password storage format for C programmers. This format provides a reasonable level of security by utilizing SHA-256 in addition to a random salt to mitigate dictionary and rainbow table attacks. In addition to the core functionality, libpwstor also offers some additional functions such as Base64 encoding and decoding. All functionality is implemented and designed in such a way as to be easy to use for C programmers of varying skill levels, while preserving reasonable security in the underlying storage format.