Free computing software software for linux

Rhinote is a simple Python/Tkinter script which provides virtual "sticky-notes" on your desktop. Rhinote is handy for jotting down quick notes or holding copied text that you plan to paste elsewhere later.

Text can be cut, copied, and pasted; and notes can be saved (as plain text) and viewed and/or edited later, in Rhinote or any other text-editing application.

While many such applications exist for virtually all computing platforms, Rhinote is extremely simple, lightweight, and "keyboard-friendly."

Ch is an embeddable C/C++ interpreter for cross-platform scripting, shell programming, 2D/3D plotting, numerical computing, and embedded scripting. C/Ch/C++ allow users to use one language, anywhere and everywhere, for any programming tasks. Ch is the solution for:
- Embedded Scripting
- Enterprise
- Academic
- Plotting and Numerical Computing
C++ is C plus plus minus. Ch is C plus (Ch = C+). Ch is a C interpreter. Ch is C with classes and high-level extensions. Ch is a superset of C. Note that C++ is no longer a superset of C. For example, VLA and IEEE floating-point arithmetic in C are not supported in C++.
C is for low-level system programming and embedded systems; C++ for large-scale projects. Ch is optimal for platform-independent scripting in numerical computing and visualization, rapid application development, Web programming and plotting, embedded scripting, shell programming and integration with legacy systems.
Like C++, Ch is designed to be a superset of C, which means a C program can run in Ch without modification. Unlike C++ which is designed for serious professional programmers (elite), Ch is designed for both novice beginners with no computer experience (average Joe and John) as well as experienced programmers.

VCG TriMeshInfo is a tool designed to inspect 3D models and retrieve many types of topological and geometrical information from them.
It can be used to automate the process of decoding 3D mesh inherent properties and ease data classification and retrieval.
For each analyzed dataset, the following data are extracted:
- Number of Vertices (Unreferenced vertices are listed separately)
- Number of Faces
- Number of Edges
- Number of Connected Components
- Number of Boundaries
- Number of Isolated Vertices (i.e. Unreferenced)
- Manifold
- Genus (Computed only for Manifold Datasets)
- Orientability
- Orientation
- Regularity (We consider as regular those meshes generated through regular subdivision. Each non boundary vertex of a regular mesh has 6 incident edges, if there are only 5 incident edges the mesh is said to be semi-regular, irregular in all other cases)
- Number of Duplicated Vertices
- Self-Intersection (Currently computed only for Datasets with less than 3M faces)
Enhancements:
- This release included a major rewrite of the core component for computing geometrical and topological features of the analyzed mesh.
- Important changes included speeded up self-intersection tests, more robust (and correct) computation of topological genus and volume, and more flexible output with an HTML output option.

MPICH (MVAPICH2) software delivers best performance, scalability and fault tolerance for high-end computing systems and servers using InfiniBand, iWARP and other RDMA-enabled interconnect networking technologies. This software is being used by more than 540 organizations world-wide (Current Users) to extract the potential of these emerging networking technologies for modern systems. This software is also being distributed by many InfiniBand, iWARP and RDMA-enabled interconnect vendors in their software distributions. MVAPICH and MVAPICH2 are also available with Open Fabrics Enterprise Distribution (OFED) stack.
MVAPICH software is powering several supercomputers in the TOP 500 list. Examples (from the June 07 ranking) include:
- 15th, 5848-core Dell PowerEdge Intel EM64T 2.66 GHz cluster at Texas Advanced Computing Center/Univ. of Texas
- 19th, 9216-core Appro Quad Opteron dual Core 2.4 GHz at Lawrence Livermore National Laboratory
- 71st, 2200-processors Apple Xserve 2.3 GHz cluster at Virginia Tech
Enhancements:
- New message coalesing, hot-spot avoidance, application-initiated systems-level checkpointing, APM support, multi-rail support for iWARP, on-demand connection management for iWARP and uDAPL (including Solaris), RDMA read, and blocking support.
- The software was also updated to MPICH2 1.0.5p4.

BOINC project lets you donate computing power to scientific research projects.
Some projects are:
- Climateprediction.net: study climate change
- Einstein@home: search for gravitational signals emitted by pulsars
- LHC@home: improve the design of the CERN LHC particle accelerator
- Predictor@home: investigate protein-related diseases
- Rosetta@home: help researchers develop cures for human diseases
- SETI@home: Look for radio evidence of extraterrestrial life
- Cell Computing biomedical research (Japanese; requires nonstandard client software)
- World Community Grid: advance our knowledge of human disease. (Requires 5.2.1 or greater)

Nihongo Benkyo is a Japanese dictionary and learning tool for Linux and Windows.
Its goal is to provide a comprehensive application that will help you learn Japanese. It is free software licensed with GNU General Public License and provided without any warranty of any kind.
Main features:
- Is available for Windows, Linux and other Unix operating systems.
- Imports JMDict, a word dictionary with a lot of interesting metadata.
- Imports JMnedict, a proper name dictionary.
- Imports EDICT, a format in which you can find many specialized dictionaries (science, computing, etc).
- Imports Kanjidic2, a kanji dictionary with over 10,000 entries.
- Finds words from Japanese (kanji, kana, romaji) or from a translation.
- Lists results in a table for quick overview.
- Shows further details about a selected result (part of speech, similar words, dialect...).
- Scans selection from other applications.
- Keeps an history of searched words so you can go back and go forward easily.
- Has its interface translated into bulgarian, english, french, japanese and spanish.

Linda is an widely studied distributed computing environment, centered around the notion of a tuple space. A tuple space is a bag (also called a multi-set) of tuples.

A tuple is an ordered, typed chunk of data. Tuple spaces exist independently of processes in the system, and the data placed into a tuple space also exist independently. See "Generative communication in Linda" (1985) and "Multiple tuple spaces in Linda" both by David Gelernter for more information on Linda.

PyLinda is a simple implementation of a linda system, however it also includes several of the more recently proposed extensions to Linda in the form of multiple tuple spaces, garbage collection, sane non-blocking primitives and bulk tuple operations.