RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating system designed for embedded systems.
The acronym RTEMS initially stood for Real-Time Executive for Missile Systems, then became Real-Time Executive for Military Systems before changing to its current meaning. RTEMS development began in the late 1980s with early versions of RTEMS available via ftp as early as 1993. OAR Corporation is currently managing the RTEMS project in cooperation with a Steering Committee which includes user representatives.
A free MS Word reader for Linux and RISC OS. Antiword converts the files from Word 2, 6, 7, 97, 2000 and 2002 to text and postscript. There are ports to BeOS, OS/2, MacOS X, VMS, DOS and others
unRAR - free utility for RAR archives
The unRAR utility is a freeware program, distributed with source code and developed for extracting, testing and viewing the contents of archives created with the RAR archiver, version 1.50 and above.
具體功能, A Free introduction on spring framework. 簡單地說，Spring 是一個以控制倒置(Inversion of Control)原則為基礎的輕量級框架。控制倒置是一個用于“基于組件的體系結構”的設計模式，它將“判斷依賴關系”的職責移交給容器，而不是由組件本身來判斷彼此之間的依賴關系。當在Spring內實現組件時, 容器“輕量級”的方面就展現出來了：針對Spring開發的組件不需要任何外部庫；而且, 容器是輕量級的，它避免了像EJB容器那樣的重量級方案的主要缺點，例如啟動時間長、測試復雜、部署和配置困難，等等。
