Welcome to the PRG++ package to perform numerical, specifically Density Matrix, Renormalization Group calculations.

The code is a rewrite of my DMRG code in use since the 1990s and development of this version started in 2001. It is in production mode and in use by several groups world wide.

The code featured Posix parallelization and has suppot for MPI based distributed parallelization.

The code supports: - Many different local site types, e.g.: - spinless fermions, spin 1/2 fermions - bosons, hard core bosons - SU(2), SU(3) and SU(4) in various representations - Fermi-Bose systems - BCS type model

- ground state and few to many excited states

- real and imaginary time evolution via full and adaptive schemes employing Krylov sub space techniques - Orthogonal polynomial, e.g. Chebychev, expansion

- Various solver for Greensfunctions using the correction vector approach

- Adiabatic state evolution - Flexible definition of the system and the Hamiltonian via an internal Parser - An internal calculator for the evaluation of expression in the input file - A class for performing calculations for fermionic Hamiltonians, e.g. the calculation of commutators

- support for quantum chemistry type models The code is written in C++ and needs at least C++14. and the Boost.org library (headers only). In order to make use of special functions as defined in C++-17 in the internal calculator you do need to compile with at least C++-17.

The code is triple licensed: GPL v2, GPL v3 or Apachy 2.

gentoo overlay for professional audio apps, -rt kernel and more

prooties is a small collection of proot-based thingies and as such should not be confused with smarties. prooties are licensed under WTFPL.

pymnl (rhymes with hymnal) is an LGPL-licensed pure Python re-implementation of libmnl and provides a minimal framework for communicating with Linux Netlink.

The aim of the Q3MIN project is the creation of a freely distributable minimalistic game package compatible with Quake III Arena originally created by id Software. The package should be as small as possible and be able to provide all the functionality (game code and artwork) needed to load and play freely distributable levels (maps) that were created as add-ons for Quake III Arena. Game code shall be based on the ioquake3 engine (distributed under the GPL). Artwork shall be either created by our developers or adapted from existing freely distributable (GPL) games. We also plan to introduce modifications and new features to the game engine to enhance playing experience.

QCodeEdit is a source code editing framework written in C++/Qt4. It provide basic widgets and advanced syntax-related features that make it extremely easy to setup a proper source code editor for any language and embed it in a larger GUI application.

It is dual licensed : GPL for free and BSD (or similar permissive licenses) for a reasonable fee.

QElectroTech is a free software (licensed under GNU/GPL) to make electric diagrams. Written in C++ using the Qt5 library, it is freely available for the following platforms: GNU/Linux, Windows and Mac OS.

Client netsoul (protocole utilisé au sein du campus IONIS) multiplateforme (Qt). Le programme est sous licence GPLv3.

QOwnNotes is the open source notepad with markdown support and todo list manager for GNU/Linux, Mac OS X and Windows, that works together with the default notes application of ownCloud and Nextcloud.

License: GPL v2 Git-repository: https://github.com/pbek/QOwnNotes

QSnippets is a simple application written in Qt4/C++ and Licenced under GPL v3 licence, the main idea for qsnippets is storing the valuable chunk of code that every developer needs to.