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BIND version 9 is a major rewrite of nearly all aspects of the underlying BIND architecture. Some of the important features of BIND 9 are: DNS Security: DNSSEC (signed zones), TSIG (signed DNS requests) IP version 6: Answers DNS queries on IPv6 sockets, IPv6 resource records (AAAA) Experimental IPv6 Resolver Library DNS Protocol Enhancements: IXFR, DDNS, Notify, EDNS0 Improved standards conformance Views: One server process can provide multiple "views" of the DNS namespace, e.g. an "inside" view to certain clients, and an "outside" view to others. Multiprocessor Support See the CHANGES file for more information on new features.

The Xen Project hypervisor is an open-source type-1 or baremetal hypervisor, which makes it possible to run many instances of an operating system or indeed different operating systems in parallel on a single machine (or host). The Xen Project hypervisor is the only type-1 hypervisor that is available as open source. It is used as the basis for a number of different commercial and open source applications, such as: server virtualization, Infrastructure as a Service (IaaS), desktop virtualization, security applications, embedded and hardware appliances

The Xen Project hypervisor is an open-source type-1 or baremetal hypervisor, which makes it possible to run many instances of an operating system or indeed different operating systems in parallel on a single machine (or host). The Xen Project hypervisor is the only type-1 hypervisor that is available as open source. It is used as the basis for a number of different commercial and open source applications, such as: server virtualization, Infrastructure as a Service (IaaS), desktop virtualization, security applications, embedded and hardware appliances

Dovecot is an open source IMAP and POP3 email server for Linux/UNIX-like systems, written with security primarily in mind. Dovecot is an excellent choice for both small and large installations. It's fast, simple to set up, requires no special administration and it uses very little memory. Dovecot is high-performing, self-optimizing, self-healing, and easily extensible. It includes IMAP4rev1 and POP3 support. IPv6, SSL and TLS are supported. It supports multiple commonly used IMAP extensions, including SORT, THREAD and IDLE.

SNMP++v3.x is a C++ API which supports SNMP v1, v2c, and v3. SNMP++v3.x is based on SNMP++v2.8 from HP* and extends it by support for SNMPv3 and a couple of bug fixes. The v3 support to SNMP++ and AGENT++ is provided by courtesy of Jochen Katz (katz07@agentpp.com). SNMP++v3.x extends the original SNMP++v2.8 by the following: # SNMPv3 including User Security Model (USM) with: # MD5 and SHA authentication # DES and IDEA privacy # Thread-safety # Bug-fixes

grepcidr can be used to filter a list of IP addresses against one or more Classless Inter-Domain Routing (CIDR) specifications, or arbitrary networks specified by an address range. As with grep, there are options to invert matching and load patterns from a file. grepcidr is capable of comparing thousands or even millions of IPs to networks with little memory usage and in reasonable computation time. grepcidr has endless uses in network software, including: mail filtering and processing, network security, log analysis, and many custom applications.

Unworkable is a BSD-licensed BitTorrent implementation for UNIX written from-scratch in C. It uses libevent for scalable asynchronous networking and the mmap() system call for local data access. Some of the goals of the project include (in no particular order) high code quality, efficiency, simplicity and security. Unworkable is still in an early stage of development, and is far behind most other BitTorrent implementations. However, it is usable for some basic things and the source code is quite minimal(4,000 lines of C compared to rTorrent's 40,000+ of C++).

Bitflu is a free BitTorrent client. The client was written in Perl and is designed to run as a daemon (7x24h , like mlnet) on Linux, *BSD and maybe even OSX. * Multiple downloads * Designed to run as a daemon/No GUI: You can connect to the client using the telnet or HTTP interface * Security: The client can chroot itself and drop privileges * Bandwith shaping (currently only upload) * Crash-Proof design: Crashes or a full filesystem will never corrupt your downloads again :-) * Non-Threading/(almost)Non-Forking design: All connections are handled in non-blocking state using a dynamic select loop

GNUnet is an anonymous, distributed, reputation-based network. A first service implemented on top of the networking layer allows censorship- resistant file-sharing. Our goal is to provide an infrastructure for secure networking. All communication in GNUnet is authenticated and encrypted. The reputation model makes attacks on the network harder. GNUnet does not rely on any centralized services. While our goals are similar to projects like Freenet, Gnutella, MojoNation and others, we hope to provide a superior combination of features for users that value security more than efficiency.

AFS is a distributed filesystem product, pioneered at Carnegie Mellon University and supported and developed as a product by Transarc Corporation (now IBM Pittsburgh Labs). It offers a client-server architecture for federated file sharing and replicated read-only content distribution, providing location independence, scalability, security, and transparent migration capabilities. AFS is available for a broad range of heterogeneous systems including UNIX, Linux, MacOS X, and Microsoft Windows. IBM branched the source of the AFS product, and made a copy of the source available for community development and maintenance. They called the release OpenAFS.