File system/directory monitoring utilities with loggin and task processing support (can execute files or make a WCF service call). Multiple configuration options. Source code libraries can be used to create a custom file system monitor.
Open Source Web Single Sign-On
An open source project originally designed to provide the University of Michigan with a secure single sign-on web authentication system. Cosign is part of the National Science Foundation Middleware Initiative (NMI) EDIT software release.
libivykis is a thin wrapper over various OS'es implementation of I/O readiness notification facilities (such as poll(2), kqueue(2)) and is mainly intended for writing portable high-performance network servers.
MyServer development has moved to GNU savannah since it became an official GNU Project: https://savannah.gnu.org/projects/myserver
Web, Wap & iMode Java J2SE/J2EE Lightweight Framework and Tools
Robust and flexible VPN network tunnelling
OpenVPN is a robust and highly flexible tunneling application that uses all of the encryption, authentication, and certification features of the OpenSSL library to securely tunnel IP networks over a single TCP/UDP port. Discussion forums and project wiki can be found here: https://forums.openvpn.net/ http://community.openvpn.net/openvpn
The project is abandoned please see forum's topic "why is this project abandoned" for explanations, if you want to take over - please write.
easyasio is a cross-platform library uses asio for asynchronous TCP/UDP server/client. You can move from TCP to UDP/UDP to TCP without chaining your code at all, and it has connection pool/manager to handle clients connection/disconnection and messages