SolarBeam is a Home & Education software developed by Martin Matusiak. After our trial and test, the software is proved to be official, secure and free. Here is the official description for SolarBeam:
SolarBeam is an application for drawing solar Diagrams. That is to say a diagram that shows the position of the Sun over the course of a day, for a given place on Earth. For a description, read the explanation.
Features 2000 predefined Locations worldwide with accurate geographic coordinates and timezone information. (User defined locations are also supported.) World map display for location finding. Daylight saving time information included where applicable. Interactive input allows tracing paths along the diagram. Diagrams are scalable to any size for inclusion in documents. Command line client for automated querying. SolarBeam is Free Software. That is, you can freely modify it, Improve it etc. Runs on any major operating system with .NET/Mono. you can free download SolarBeam 1.0 now.