The OpenBSD project produces a free, multi-platform 4.4BSD-based UNIX-like operating system. Its goals emphasize portability, standardization, correctness, proactive security, and integrated cryptography. OpenBSD supports binary emulation of most programs from SVR4 (Solaris), FreeBSD, Linux, BSD/OS, SunOS, and HP-UX.
The Free&Alter Software Distribution offers a Free Software distribution downloadable for Solaris, HPUX, and IRIX. It contains 100 of the most popular Free Software applications used in research centers, like the GNU utilities, XEmacs, DDD, the GIMP, and Scilab. Unlike other distributions, it can be installed in the directory of your choice. The installation takes place in an intuitive GUI, and environment variables are easily managed by TkChoice.
LUFS is a hybrid userspace filesystem framework supporting many "exotic" filesystems (localfs, sshfs, ftpfs, httpfs, socketfs, freenetfs, and nutellafs) transparently for any application. It can be regarded as doing the same job as the VFS (virtual filesystem switch) in the kernel: it is a switch, distributing the filesystem calls to its supported filesystems. However, LUFS filesystems are implemented in userspace. This would be a drawback for local filesystems where the access speed is important, but proves to be a huge advantage for networked filesystems where the userland flexibility is most important.
OSSP cfg is a ISO-C library for parsing arbitrary C/C++-style configuration files. A configuration is sequence of directives, each directive consists of zero or more tokens, and each token can be either a string or again a complete sequence. This means the configuration syntax has a recursive structure and allows you to create configurations with arbitrarily-nested sections. The configuration syntax also provides complex single/double/balanced quoting of tokens, hexadecimal/octal/decimal character encodings, character escaping, C/C++ and shell-style comments, etc. The library API allows importing of a configuration text into an Abstract Syntax Tree (AST), traversing the AST, and optionally exporting the AST again as a configuration text.
Platform Independent Petri Net Editor (PIPE) creates and analyses Petri Nets quickly, efficiently, and effectively. A key design feature is the modular approach adopted for analysis, enabling new modules to be written easily and powerfully, using built-in data layer methods for standard calculations. Six analysis modules are provided, including Invariant Analysis, State-Space Analysis (deadlock, etc.), and Simulation Analysis and Classification. PIPE adheres to the XML Petri net standard (PNML). The file format for saving and loading Petri Nets is extensible through the use of XSLT, the default being PNML.
The stmpclean utility removes old files (and old empty directories) from the specified directory. It is meant to be used to clean directories such as "/tmp" where old files tend to accumulate. stmpclean never removes files or directories owned by root, which is a feature, not a bug. Great care is taken while descending into the directory, and the operation is secure. Anything that's not a directory, regular file, or symbolic link is also left alone (because programs like screen(1) create sockets and FIFOs under /tmp and expect them to be long-lived). Unlike other programs that do the same task, stmpclean never forks and consumes limited amount of memory. If stmpclean determines a race condition it will log the situation and exit with a failure.