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The RPM Package Manager is a powerful command line driven package management system capable of installing, uninstalling, verifying, querying, and updating computer software packages. Each software package consists of an archive of files along with information about the package like its version, a description, and the like. There is also a related API ("Application Program Interface"), permitting advanced developers to bypass 'shelling out' to a command line, and to manage such transactions from within a native coding language.

The Analysis & Resynthesis Sound Spectrograph (formerly known as the Analysis & Reconstruction Sound Engine), or ARSS, is a program that analyses a sound file into a spectrogram and is able to synthesise this spectrogram, or any other user-created image, back into a sound. ARSS is now superseded by Photosounder, which makes use of most of the techniques offered by ARSS in a simple to use and powerful graphical user interface and built in editor.

Many audio synthesis and recording packages are in use or in development. These work in many different ways. LADSPA provides a standard way for `plugin' audio processors to be used with a wide range of these packages. For instance, this allows a developer to make a reverb program and bundle it into a LADSPA `plugin library.' Ordinary users can then use this reverb within any LADSPA-friendly audio application.

PulseAudio, previously known as Polypaudio, is a sound server for POSIX and Win32 systems. A sound server is basically a proxy for your sound applications. It allows you to do advanced operations on your sound data as it passes between your application and your hardware. Things like transferring the audio to a different machine, changing the sample format or channel count and mixing several sounds into one are easily achieved using a sound server.

Jellyfish is a tool for fast, memory-efficient counting of k-mers in DNA. A k-mer is a substring of length k, and counting the occurrences of all such substrings is a central step in many analyses of DNA sequence. JELLYFISH can count k-mers quickly by using an efficient encoding of a hash table and by exploiting the "compare-and-swap" CPU instruction to increase parallelism.

汉字转换器，可以在国标码（GB）和大五码（BIG-5）之间转换。 这个程序转换一个国标码（GB）文件为一个大五码（BIG-5）文件，或者一个大五码（BIG-5）文件为一个 国标码（GB）文件。GB（国标）是指中国大陆的“GB2312-80”的标准实现，用两个字节代表一个 GB 码， 重要位设置为1。BIG-5是指1984年由台湾信息产业研究所公布的大五码标准。 -- David O'Brien

While preparing for a release 4.2 of the sdr-j software package, we created two new programs a DAB receiver a broad spectrum version of the FM receiver It is quite obvious that one can use a DAB stick to receive DAB programs. However, the DAB software presented here is a real SDR in that it uses the 8 bit I/Q samples of the DAB stick.

libb64 is a library of ANSI C routines for fast encoding/decoding of data into and from a Base64-encoded format. C++ wrappers are included, as well as the source code for standalone encoding and decoding executables. Base64 uses a subset of displayable ASCII characters, and is therefore a useful encoding for storing binary data in a text file, such as XML, or sending binary data over text-only communication channels.

DBIx::Connector provides a simple interface for fast and safe DBI connection and transaction management. Connecting to a database can be expensive; you don't want your application to re-connect every time you need to run a query. The efficient thing to do is to hang on to a database handle to maintain a connection to the database in order to minimize that overhead. DBIx::Connector lets you do that without having to worry about dropped or corrupted connections.

With Relations::Query you can create a 'select' query by creating a new query object, and passing hashes, arrays, or strings of info to the constructor, such as what's within the variables clause, what to order by, etc. You can also add and override clause info in the query as well, on both a permanent and temporary basis. With the to_string() function, you can create a query string from a hash, query object or string.