HandBrake is an open-source, GPL-licensed, multiplatform, multithreaded video transcoder, available for MacOS X, Linux and Windows. Supported sources: Any DVD-like source: VIDEO_TS folder, DVD image or real DVD (unencrypted--protection methods including CSS are not supported internally and must be handled externally with third-party software and libraries), and some .VOB and .TS files Most any multimedia file it can get libavformat to read and libavcodec to decode. Outputs: File format: MP4, MKV, AVI or OGM Video: MPEG-4, H.264, or Theora (1 or 2 passes or constant quantizer/rate encoding) Audio: AAC, MP3, Vorbis or AC-3 pass-through (supports encoding of several audio tracks) Misc features: Chapter selection Basic subtitle support (burned into the picture) Integrated bitrate calculator Picture deinterlacing, cropping and scaling Grayscale encoding

This package is the most simple way to equip your Macintosh Apple OSX System with Ruby

photoshop like open source image editor for mac

An Open Source language checker for English, German, Polish, Dutch, and other languages. This is a rule-based language checker that will find errors for which a rule is defined in its XML configuration files. Rules for more complicated errors can be written in Java. You can think of LanguageTool as a tool to detect errors that a simple spell checker cannot detect, e.g. mixing up there/their, no/now etc. It can also detect some grammar mistakes. It does not include spell checking. See the languages page for a list of supported languages.

GrOWL is the Ecoinformatics Collaboratory's answer to the need of intuitive knowledge visualization and editing tools. GrOWL is open source, written in Java, and it can be downloaded in the download section of this site.

The filebrowser is a lightweight PHP application that allows you to thumbnail images and view them in a web browser. By Lussumo(Vanilla forum)

It's an open source server and client system for enterprise messaging and collaboration email, contacts, and group calendaring. It has open APIs and a lot of potential for mashups. I was very impressed, desktop type interface with filders and tags.