Free concept based software for linux

Concepts project is a C++ class library for solving elliptic partial differential equations (PDEs) numerically.

The design principle is the transfer of mathematical objects and grammar used to specify mathematical and numerical models of physical systems isomorphically into simulation software.

The design realization uses the C++ functionality of inheritance and derived classes.

Know Base project consists of knowledge, document, and project management tool.

Know Base is a Web-based knowledge management system. It allows users to share files and projects across multiple business divisions.

A unique notification system alerts users when projects are modified, or when new projects are added that match their search terms.

Fid Core Library is the core library for the Frigand Imperial Desktop, a genuine Unix desktop environment based around multiprocessing, text-stream IPC, and the "everything is a file" concept.
It supports Emacs-like extensibility, customizability, and built-in multi-buffer support.
Enhancements:
- This release adds testing support for the axioms over buffer implementations and user interfaces, a better implementation of interactive, and a new cursor movement mechanism that allows the user interface to manage point itself (and, hence, keep it always on a widget).

Net::Server is an extensible, general Perl server engine.
SYNOPSIS
#!/usr/bin/perl -w -T
package MyPackage;
use Net::Server;
@ISA = qw(Net::Server);
sub process_request {
#...code...
}
MyPackage->run(port => 160);
exit;
Main features:
- Single Server Mode
- Inetd Server Mode
- Preforking Simple Mode (PreForkSimple)
- Preforking Managed Mode (PreFork)
- Forking Mode
- Multiplexing Mode using a single process
- Multi port accepts on Single, Preforking, and Forking modes
- Simultaneous accept/recv on tcp, udp, and unix sockets
- Safe signal handling in Fork/PreFork avoids perl signal trouble
- User customizable hooks
- Chroot ability after bind
- Change of user and group after bind
- Basic allow/deny access control
- Customized logging (choose Syslog, log_file, or STDERR)
- HUP able server (clean restarts via sig HUP)
- Dequeue ability in all Fork and PreFork modes.
- Taint clean
- Written in Perl
- Protection against buffer overflow
- Clean process flow
- Extensibility
Net::Server is an extensible, generic Perl server engine. Net::Server combines the good properties from Net::Daemon (0.34), NetServer::Generic (1.03), and Net::FTPServer (1.0), and also from various concepts in the Apache Webserver.
Net::Server attempts to be a generic server as in Net::Daemon and NetServer::Generic. It includes with it the ability to run as an inetd process (Net::Server::INET), a single connection server (Net::Server or Net::Server::Single), a forking server (Net::Server::Fork), a preforking server which maintains a constant number of preforked children (Net::Server::PreForkSimple), or as a managed preforking server which maintains the number of children based on server load (Net::Server::PreFork). In all but the inetd type, the server provides the ability to connect to one or to multiple server ports.
Net::Server uses ideologies of Net::FTPServer in order to provide extensibility. The additional server types are made possible via "personalities" or sub classes of the Net::Server. By moving the multiple types of servers out of the main Net::Server class, the Net::Server concept is easily extended to other types (in the near future, we would like to add a "Thread" personality).
Net::Server borrows several concepts from the Apache Webserver. Net::Server uses "hooks" to allow custom servers such as SMTP, HTTP, POP3, etc. to be layered over the base Net::Server class. In addition the Net::Server::PreFork class borrows concepts of min_start_servers, max_servers, and min_waiting servers.
Net::Server::PreFork also uses the concept of an flock serialized accept when accepting on multiple ports (PreFork can choose between flock, IPC::Semaphore, and pipe to control serialization).

Rule Set Based Access Control (RSBAC) is a Free Software security extension for current Linux kernels. Rule Set Based Access Control is based on the Generalized Framework for Access Control (GFAC) by Abrams and LaPadula and provides a flexible system of access control based on several modules.
All security relevant system calls are extended by security enforcement code. This code calls the central decision component, which in turn calls all active decision modules and generates a combined decision. This decision is then enforced by the system call extensions.
Main features:
- Free Open Source (GPL) Linux kernel security solution
- Independent of governments and big companies
- Several well-known and new security models, like MAC, ACL and RC
- On-access virus scanning with the Dazuko interface
- Detailed control over individual user and program network accesses
- Fully access controlled kernel level user management
- Any combination of security models possible
- Easily extensible: write your own model for runtime registration
- Support for latest kernels and stable for production use
Enhancements:
- This release relates to kernel 2.4.34.5 and 2.6.22.1.
- There are important fixes with some compilation errors and an important bug with User Management password hashing, introduced with the newer 2.6 kernel crypto API.
- Some security has been added with safety measures against null pointers.

HomeBank is the software you have always wanted to manage your personal accounts at home. The main concept is to be light, simple and very easy to use. HomeBank brings you many features that allows you to analyze your finances in a detailed way instantly and dynamically with powerfull report tools based on filtering and graphical charts.

Furthermore HomeBank benefits now for more than 10 years of users experiences and feedbacks as its development started in 1995 on Amiga computers. It is now available on Amiga, GNU/Linux, and will probably be soon available for Microsoft Windows and MacOS X systems, as GTK+ exists on it.

Really, if you are looking for an easy way to do your home accounts, then HomeBank should be the software you choose. Just take a little time to try it out now, and you wont regret doing so...

acidlaunch is a light weight GTK based launch bar.

It is designed to be small and light, with a simple XML based configuration format. Its also designed to work well with blackbox.

CerbeRun is a software able to parse .run files, then to execute them. CerbeRun is designed to make easier the use of Linux desktop computers for normal user, that is not forced to switch to root user in order to execute new applications. The main concept on which CerbeRun and the .run format are based is:

download
double-click
execution and enjoying

All is performed comfortably and with user grants only . Users from other systems are accustomed to download software and save it on supports, to be executed later or to be shared with friends. At present, it is not so easy (some times impossible) to save & distribute packages with .DEB or .RPM formats or other user-side formats (klik, 0install, packages), as in Mac or Windows systems.

CerbeRun and .run format, instead, merge the advantages of two above mentioned systems, because Windows .exe are single files to be executed, while Macintosh .app files can be installed and executed after a dragndrop, without a real installation step.