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The gpxloggerd is a tiny daemon that connects to gpsd(8) and logs received fix information in the GPX format.

fowsr is an application that reads from wireless weather stations * WH1080 / WH1081 / WH1090 / WH1091 / WH2080 / WH2081 * Watson W-8681 * Scientific Sales Pro Touch Screen Weather Station * TOPCOM NATIONAL GEOGRAPHIC 265NE * PCE-FWS 20 * ... and other similar USB devices from Fine Offset Electronics Co., LTD. compatible with the EasyWeather application . The result is a weather history log file that can be uploaded to a central server for further processing. Example script files for uploads is included. So far the following formats are supported: * Weather Underground * pywws * XML fowsr performs a complete read out of the weather station memory using its USB port, and stores the result in a cache file to speed up later read-outs. Rain data is then calculated per hour, day, week and month if data for these periods exist. No further data processing is performed. This makes fowsr very small and well suited for running in embedded devices at remote locations.

KStars is a desktop planetarium for KDE. It provides an accurate graphical simulation of the night sky, from any location on Earth, at any date and time. The display includes up to 100 million stars, 13,000 deep-sky objects, all 8 planets, the Sun and Moon, and thousands of comets and asteroids.

jday and j2d are command line utilities to convert calendar dates to astronomical julian dates, and julian dates to calendar dates. There is a corresponding library libjday.a which can be used for the same functionality within applications.

The General Astrodynamics Library (GAL) is a numerical library for C and C++ programmers. It is free software under the GNU General Public License. The library provides a wide range of astrodynamical routines such as ephemerides, earth orientation, and orbit propagation. There are over 170 functions in total with an extensive test suit

Libkgeomap is a KDE4 C++ wrapper around world map components such as Marble, OpenstreetMap, and GoogleMap, for browsing and arranging photos on such maps.

libnova is a general purpose, double precision, astronomical calculation library. The intended audience of libnova is C / C++ programmers, astronomers and anyone else interested in calculating positions of astronomical objects.

Library for handling binary OpenStreetMap data

This is a trivial program that displays the phase of the moon. It may help when you play a game that depends on the phase of the moon (nethack, nlith, etc.). It can also be used to calculate her...um, you figure this one out. ;)

Marble is a Virtual Globe and World Atlas that you can use to learn more about Earth: You can pan and zoom around and you can look up places and roads.