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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

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. ;)

Astro::Coords is a class for manipulating and transforming astronomical coordinates. Can handle the following coordinate types: - Equatorial RA/Dec, galactic (including proper motions and parallax) - Planets - Comets/Asteroids - Fixed locations in azimuth and elevations - Interpolated apparent coordinates For time dependent calculations a telescope location and reference time must be provided. See Astro::Telescope and DateTime for details on specifying location and reference epoch.

Starlink::AST provides a perl wrapper to the Starlink AST library. The Starlink AST library provides facilities for transforming coordinates from one system to another in an object oriented manner. Multiple coordinate frames can be associated with a data set and it is also possible to generate automatic mappings between frames. Coordinate frame objects can be imported from FITS headers and from NDF files.

py-aipy collects together tools for radio astronomical interferometry. In addition to pure-python phasing, calibration, imaging, and deconvolution code, this package includes interfaces to MIRIAD (a Fortran interferometry package) and HEALPix (a package for representing spherical data sets), and some math/fitting routines from SciPy.

astLib is a set of Python modules that provides some tools for research astronomers. It can be used for astronomical plots, some statistics, common calculations, coordinate conversions, and manipulating FITS images with World Coordinate System (WCS) information through PyWCSTools - a simple wrapping of WCSTools by Doug Mink. PyWCSTools is distributed (and developed) as part of astLib.

This is a WindowMaker dockapp that displays a graphical representation of the phase of the moon, plus additional astronomical data such as rise/set times, orbital data, orbital elements, etc (if you click on the image multiple times). Probably most of the data is not that useful, but what the heck :)

JOSM is the "Java OpenStreetMap Editor". It is a feature-rich editor for the experienced OSM mapper. It requires some configuration efforts. But if you intend to become a great OSM mapper, it's worth the time you need to get used to it.

Libre is a portable and generic library for real-time communications with async IO support and a complete SIP stack with support for SDP, RTP/RTCP, STUN/TURN/ICE, BFCP and DNS Client. Features: - SIP Stack (RFC 3261) - SDP - RTP and RTCP - DNS-Client - STUN/TURN/ICE - BFCP - Jitter-buffer - Async I/O (poll, epoll, select) - UDP/TCP/TLS transport

Bristol is an emulation package for a number of different 'classic' synthesisers including additive, subtractive and a few organs. The application consists of the engine, which is called bristol, and its own GUI library called brighton that represents all the emulations.