Free netbsd software for linux

NetBSD is a free, secure, and highly portable Unix-like Open Source operating system available for many platforms, from 64-bit Opteron machines and desktop systems to handheld and embedded devices.
Its clean design and advanced features make it excellent in both production and research environments, and it is user-supported with complete source. Many applications are easily available through The NetBSD Packages Collection.
Main features:
- Clean design
- Wide platform support
- BSD License
- Full source availability
- Security
- Mature and stable
- Hype free
- Packet filtering and Network Address Translation (NAT)
- IPv6
- Network File System (NFS)
- Comprehensive and robust networking
- Wireless networking
- Hardware and software RAID
- High performance PCI IDE
- SCSIPI subsystem - combined SCSI and ATAPI
- 64-bit filesystems
- Large IDE disks
- Soft Updates on FFS for high performance and reliability
- Many filesystem types
- DVD ROM and RAM
- The package system (applications)
- Machine independent driver framework
- Machine independent audio framework
- Kernel debugging
- OS emulation
- USB (Universal serial bus)
- Other device support
- The UVM virtual memory system
- Cardbus
- wscons machine independent console
- 64-bit clean
- Non-executable stack and heap

polyBSD is a "multi"-purpose (hence "poly") framework for building embedded systems based on NetBSD.

Of the three major *BSD flavors, FreeBSD and OpenBSD are often in the spotlight.
FreeBSD is touted for its stability, while OpenBSD usually claims the title of
the most secure operatin system available.

However, the third flavor (NetBSD) is what many consider to be the unsung hero - it has features that rival those of both FreeBSD and OpenBSD however is not often seen in the news. NetBSD has arguably the cleanest code base of all open source operating systems this fact has unforseen effect on its overall features. The reason for
NetBSDs clean code is the its stated goal to run on as many hardware architecture
as possible. In order to do that, the team behind NetBSD has been forced to write
code that is portable and easy to debug.

Portable code is achieved by using mostly libraries and functions that are likely to compile and run well on most platforms. In addition, in order to be able to reliably port the code to over 40 different architecture, the code has to be well written so that a large group of people can look at and understand it well so they can modify it easily and port it to a new architecture. But how does that translate into stability and security touted by FreeBSD and OpenBSD respectively. Well, clean code usually translates directly into stability - one cant expect a messy code to perform well or be easy to debug.

Clean code also leads to improved security - security bugs are easy to spot and
correct. Also the portability of the code ensures that only standard libraries
and functions are used. However, those standard libarries and functions are the
ones that have been around longer, which means they have been well tested and are
likely to contain the fewest number of security bugs.

The one feature that FreeBSD had long been able to claim exclusively is that in
terms of performance it blows all other *BSD flavors out of the water when it
comes to the i386 architecture.

However, this crown was recently captured by NetBSD thanks to an extensive performance benchmarking, the results of which are referenced on the section "NetBSD tools" on this site. So to sum it all up, NetBSD is no longer simply the portability prodigy on the block. It is a fast, rock-solid and secure operating system that can successfully meet the demands of the modern enterprise. Thats the reason for it being used by the people behind this project to build some tools that will hopefully be useful.

libdnet provides a simplified, portable interface to several low-level networking routines.
Main features:
- network address manipulation
- kernel arp(4) cache and route(4) table lookup and manipulation
- network firewalling (IP filter, ipfw, ipchains, pf, PktFilter, ...)
- network interface lookup and manipulation
- IP tunnelling (BSD/Linux tun, Universal TUN/TAP device)
- raw IP packet and Ethernet frame transmission
Supported languages:
- C, C++
- Python
- Perl, Ruby (see below)
Supported platforms:
- BSD (OpenBSD, FreeBSD, NetBSD, BSD/OS)
- Linux (Redhat, Debian, Slackware, etc.)
- MacOS X
- Windows (NT/2000/XP)
- Solaris
- IRIX
- HP-UX
- Tru64

SDL_net library is a small sample cross-platform networking library, with a sample chat client and server application. The chat client uses the GUIlib GUI framework library.

Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer. It is used by MPEG playback software, emulators, and many popular games, including the award winning Linux port of "Civilization: Call To Power."

Simple DirectMedia Layer supports Linux, Windows, BeOS, MacOS Classic, MacOS X, FreeBSD, OpenBSD, BSD/OS, Solaris, IRIX, and QNX. There is also code, but no official support, for Windows CE, AmigaOS, Dreamcast, Atari, NetBSD, AIX, OSF/Tru64, RISC OS, and SymbianOS.

SDL is written in C, but works with C++ natively, and has bindings to several other languages, including Ada, Eiffel, Java, Lua, ML, Perl, PHP, Pike, Python, and Ruby.

Create CVSup is a script that will create a cvsup server mirror for FreeBSD, NetBSD, and OpenBSD.

Create CVSup script has been tested and is known to work under FreeBSD, NetBSD, and OpenBSD.

Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer. SDL is used by MPEG playback software, emulators, and many popular games, including the award winning Linux port of "Civilization: Call To Power."
Simple DirectMedia Layer supports Linux, Windows, BeOS, MacOS Classic, MacOS X, FreeBSD, OpenBSD, BSD/OS, Solaris, IRIX, and QNX. There is also code, but no official support, for Windows CE, AmigaOS, Dreamcast, Atari, NetBSD, AIX, OSF/Tru64, RISC OS, and SymbianOS.
SDL is written in C, but works with C++ natively, and has bindings to several other languages, including Ada, Eiffel, Java, Lua, ML, Perl, PHP, Pike, Python, and Ruby.
Enhancements:
- Dynamic X11 loading is only enabled with gcc 4 supporting -fvisibility=hidden. This fixes crashes related to symbol collisions, and allows building on Solaris and IRIX.
- Fixed building SDL with Xinerama disabled.
- Fixed DRI OpenGL library loading, using RTLD_GLOBAL in dlopen().
- Added pkgconfig configuration support.

Classeine::Sdk project is a set of general purpose class libraries written in C++ for NetBSD.
Main features:
- Object oriented class hierarchy
- Memory allocation isolation
- Basic smart pointers
Classeine::Sdk runs into the following architectures:
- NetBSD/amd64 4.0 beta 2
- NetBSD/x86 4.0 beta 2
Enhancements:
- This version was reimplemented from the scratch.
- It currently supports IBase, IInterface, and Object base classes, Ptr< T > and AutoPtr< T >, and memory allocation isolation.

Autossh is a program to monitor and automatically reestablish SSH connections. Autossh is similar to rstunnel (Reliable SSH Tunnel), however, it is implemented in C, and is easier to set up and use, especially for connections to multiple hosts.
Autossh has been compiled and tested on OpenBSD, Linux, and Solaris, and should run without needing changes on FreeBSD and NetBSD.
Main features:
- autossh is a program to start a copy of ssh and monitor it, restarting it as necessary should it die or stop passing traffic. The idea is from rstunnel (Reliable SSH Tunnel), but implemented in C.
- The authors view is that it is not as fiddly as rstunnel to get to work.
- Connection monitoring using a loop of port forwardings or a remote echo service.
- Backs off on rate of connection attempts when experiencing rapid failures such as connection refused.
- Compiled and tested on OpenBSD, Linux, Solaris, Mac OS X, Cygwin, and AIX; should work on other BSDs.
- Freeware.
Enhancements:
- This minor release fixes some bugs in the Makefile and a bug when creating PID files.