Freeware In General

Google Earth is free for personal use. No registration is required.

Weather, earthquakes, and volcanos...the kind of stuff our planet dishes out to arouse human curiosity and, occasionally, fear. Fortunately for us, we have organizations like the National Weather Service and the U.S. Geological Survey to study and track Earths natural wonders, and then warn us whenever the Earth starts misbehaving!

The main difference from similar software is the possibility to calculate the position for all satellites at once. Thus, you get a clear picture about what satellites can be physically visible from the location where the dish will be installed.

It should be kept in mind that the program makes a purely theoretical calculation according to formulas and in real circumstances a lot of additional factors should be taken into account when a satellite dish is installed. These factors include various obstacles (buildings, trees), the landscape, the altitude, transponder orientation, polarization, etc. Nevertheless, this program will allow you to evaluate the position quite precisely.

The calculation can be saved to a text file, copied to the Windows clipboard or printed out at once. It is possible to save the list of locations for which the calculation is done. Later on, you will not have to enter the coordinates of these locations again. Just select them from the table.

Free for private, non-commercial use.

An e-exam (or CBT - Computer Based Testing)is an electronic exam that can be executed by using a personal computer or an equivalent electronic device (e.g. handheld computer).

The use of e-exam systems, instead of traditional paper-based tests, allows you to simplify the entire exam cycle, including generation, execution, evaluation, presentation and archiving. This simplification allows you to save time and money while improving exams reliability.

Beyond the aforementioned advantages, TCExam introduces a large number of tools and features to improve the exams total quality:

• Automatic Installation System
• platform-independent server-side software
• multilanguage support (include support for TMX standard and UTF-8 Unicode)
• based on standard and open standard technologies (PHP5, MySQL, PostgreSQL, XHTML, JavaScript, PDF)
• includes a Database Abstraction Layer with drivers for MySQL AND PostgreSQL
• Web-based accessible interface, compatible with almost all modern internet browsers
• includes a protected administration area from which it is possible to manage the whole system
• supports different access levels both for users and resources (pages, forms, sections)
• includes an additional security system to access the tests based on the check of the IP addresses
• supports an unlimited number of tests, topics, questions and answers
• supports text formatting and use of images in the description of the tests, the questions and the answers
• once defined, the topics can be used alone or together for different tests
• supports both multiple-answer questions and free-answer questions
• automatically calculates the cumulative score for multiple answers
• includes a system to manually evaluate the free answers
• generates unique tests for each user by randomly selecting questions and possible answers
• supports timing for starting time and duration of the tests
• can generate PDF versions of the tests so that they can be done without using a computer
• generates reports and statistical data both in XHTML and PDF formats
• allows the customization of the format and the headers of the PDF documents
• supports the output of the test results for the final user
• sends test results to users via email

It is being used in planetarium projectors. Just set your coordinates and go.

Features:

Sky:

• over 120,000 stars from the Hipparcos catalogue with info
• asterisms and illustrations of the constellations
• images of nebulae
• realistic Milky Way
• very realistic atmosphere, sunrise and sunset
• the planets and their satellites

Interface:

• a powerful zoom
• time control
• multilingual interface
• scripting to record and play your own shows
• fisheye projection for planetarium domes
• spheric mirror projection for your own dome
• graphical interface and extensive keyboard control

Visualisation:

• equatorial and azimuthal grids
• star twinkling
• shooting stars
• eclipse simulation
• skinnable landscapes, now with spheric panorama projection

Customisability:

• add your own deep sky objects, landscapes, constellation images, scripts...