Educational Software Tools (Part 2)

4/6/2013 9:15:00 AM

Programming without Coding Technology

Programming Without Coding Tech­nology (PWCT) is a software devel­opment tool that allows computer users to create any software they need without previous knowledge of computer programming. Unlike other visual programming languages, PWCT is not limited and targets professional and mainstream pro­grammers by giving them more pro­ductivity than traditional text-based programming languages.

PWCT is an Open Source visual programming language framework to create and use general-purpose visual programming languages wherein the programmer need not write code but can visually specify every functional aspect of the program similar to flow­charts and algorithms. It comes with four general-purpose visual program­ming languages – Harbour PWCT, Python PWCT, C#PWCT and Super-nova PWCT.

PWCT includes a new visual pro­gramming method (instead of drag-and-drop) called coding simulation method, Harbour PWCT visual pro­gramming language, DoubleS (Super Server) programming paradigm for the Harbour PWCT visual program­ming language, Python PWCT visual programming language, Supernova textual programming language devel­oped using the Harbour PWCT visual programming language, Supernova PWCT visual programming language and CSharp PWCT visual program­ming language.

Programming Without Coding Tech¬nology

Programming Without Coding Tech­nology


Celestia is a 3D astronomy program based on Hipparcos Catalogue that allows users to travel through an extensive universe, modeled after reality, at any speed, in any direc­tion and at any time in history. It displays and interacts with objects ranging in scale from small space-­crafts to entire galaxies in three dimensions using OpenGL from perspectives which would not be possible from a classic planetarium or other ground-based display. NASA and ESA have used Celestia in their educational and outreach programs as well as for interfacing to trajectory analysis software.

Celestia displaying orbital path of planets

Celestia displaying orbital path of planets

Celestia displays Hipparcos Cata­logue of 118,322 stars and uses the very accurate VSOP87 theory of planetary orbits. This makes it possi­ble for it to provide a solar and lunar eclipse finder and display the orbital paths of planets (including extraso­lar planets), dwarf planets, moons, asteroids, comets, artificial satellites and space-crafts. The users can vary the number of stars that are visible on the screen and have them drawn in different styles.

Celestia users can travel/fly through the Celestia universe using simple keyboard controls. Viewpoints can be set to look forward, backward or at any angle to direction of travel. Controls allow users to orbit stars, planets, moons and other space objects; track space objects such as space-crafts, asteroids and comets as they fly by; or travel to and/or fly through nebulae and irregular, ellip­tical and spiral galaxies (over 10,000 galaxies included).

The time simulated by Celestia can be set at any point in the future or past, although planetary orbits are accurate only within a few thousand years of the present day, and date arithmetic overflows at the year 5874774. The names and positions of multitudes of objects in space, as well as the names and locations of cities, craters, observatories, valleys, landing sites, continents, mountains, seas and other surface features can be displayed.

Celestia displays such features as detailed atmospheres on planets and moons, planet shine on orbiting satel­lites, sunsets and sunrises, moving clouds, planetary rings, eclipse and ring shadows, constellation lines, bor­ders and illustrations, night-side lights of cities, detailed surface textures, specular reflections off water and ice, nebula gases and star flares.

Information about the objects that Celestia draws can also be displayed. This includes the radius, distance, length of the sidereal day and average blackbody temperature of the planets, as well as the distance, luminosity rela­tive to the sun, spectral class, surface temperature and radius of stars.

The users can change Celestia's field-of-view from as wide as 120 degrees to a highly magnifying 3.4 seconds of arc, while dividing the window into multiple panes, in order to observe several objects at the same time. Graphic screenshots and movies can be captured in classic or HD reso­lutions (up to 1920x1080) on Windows and Linux platforms.

Celestia can be extended with new objects. There are hundreds of third-party, user-created add-ons (both fictional and realistic) available for installation. The extension mecha­nism uses Lua as its built-in scripting language.


SMEs are under fire from big busi­nesses the world over. The critical missing ingredient that makes SME business uncompetitive is informa­tion systems.

Proprietary solutions are simply beyond the reach of SMEs, and any at­tempt to adopt these systems will lead them to a never-ending cycle of license payments. TurboCASH Accounting solves this problem.



TurboCASH is a free software accounting software package aimed at small to medium-sized business market. Its core function is a General ledger, posting transactions into ac­counts and producing financial reports. Plugin technology enables developers to extend the system.

TurboCASH integrates directly with osCommerce, CRE Loaded and Zen Cart. Being originally developed in Delphi, it only runs natively on Windows.

TurboCASH is available in 25 languages, covering over 80 different tax regimes. When anyone joins it as a user, consultant or developer, he joins a community of over 100,000. Turbo­CASH is developed from the contri­butions of hundreds of up streaming developers in many compatible Open Source projects.

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