BRL-CAD is a powerful constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing support for rendering and geometric analysis, path-tracing for realistic image synthesis, network distributed framebuffer support, and image and signal-processing tools.
SaVi is satellite visualization software that lets you create, run, examine, and modify satellite orbits in two and three dimensions. Simulations of Iridium, Globalstar, Galileo, GPS, and other satellite constellations are included. SaVi requires Tcl and Tk on a system with Unix libraries. SaVi works well with the 3D renderer Geomview. Geomview is optional, though recommended for its 3D rendering capabilities.
geo-* is a set of tools for geocaching, including tools for accessing the www.geocaching.com, opencaching.com, opencaching.us, and navicache.com websites, tools for geocoding addresses and creating maps, and tools for manipulating Mapopolis place guide data. The focus of these tools is to provide a command line driven environment.
Podget is a simple podcast aggregator optimized for running as a scheduled background job (i.e. cron). It features support for downloading podcasts from RSS and XML feeds, for sorting the podcasts into folders and categories, for importing podcast URLs from iTunes PCAST files and OPML lists, automatic M3U and ASX playlist creation, and automatic cleanup of old podcasts. It also features automatic UTF-16 conversion for podcasts hosted on Windows servers.
Newpods can help you sync recently downloaded podcasts to your portable device. It will look through a directory tree to find podcasts that have been downloaded since the last time the program was run. It will then insert two commands into the bash history list: one to pushd to the podcast directory on your portable device, so you can clean out old files as needed, and one to copy the new podcasts to your portable device. If you're tired of copying files by hand, but don't want to use a heavyweight GUI solution, newpods might be right for you.
DVDripTools is a collection of scripts that operate DVD ripping tools. It consists of ripdvd, which creates an MKV, OGM, or MP4 file container very easily; ripdvdcrop, which detects the cropping to use when ripping a DVD; and ripdvdtest, which performs a ripping test of a few seconds.
Plait (pronounced "play") is a command-line jukebox and music player front end. It understands brief, easy to type queries that pick a single song, mix queries that combine works from multiple artists, and stream queries that find Shoutcast radio streams. A variety of filters are available to pick just the music you want to hear. In order to actually play the music it finds, Plait automatically hands off a playlist to one of the supported music players, or creates a playlist that you can manually load.
dirogg is a small script to migrate your entire music collection to the Ogg Vorbis format. It's a recursive script, meaning that you run it from the root of your music collection, and it will automatically convert your MP3 files to Ogg Vorbis (ogg) files. If you wish, it can also remove your MP3 files after conversion.
DVD-Baker generates a DVD consisting of menus and slideshows from a picture collection stored in a Menalto Gallery G2 Web site or in a locally stored directory tree. Each "leaf" album (an album that does not contain sub-albums) is used to create a slideshow. The slideshows (and any DVD-ready MPEG videos) are made accessible on the DVD with menus that follow the structure of the Web site or directories. Extra features include random or sequential autoplay, and audio support. Since dvd-slideshow is used to produce each slideshow, it supports effects such as crossfades, crops, and 'Ken Burns' effects.