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DBIx::Admin::DSNManager manages a file of DSNs, for both testing and production. The INI-style format was selected, rather than, say, using an SQLite database, so that casual users could edit the file without needing to know SQL and without having to install the command line program sqlite3. Each DSN is normally for something requiring manual preparation, such as creating the database named in the DSN. In the case of SQLite, etc, where manual intervention is not required, you can still put the DSN in dsn.ini. One major use of this module is to avoid environment variable overload, since it is common to test Perl modules by setting the env vars $DBI_DSN, $DBI_USER and $DBI_PASS. But then the problem becomes: What do you do when you want to run tests against a set of databases servers? Some modules define sets of env vars, one set per database server, with awkward and hard-to-guess names. This is messy and obscure. DBIx::Admin::DSNManager is a solution to this problem.

The C# interface to Avahi service discovery.

paq is a family of archivers with the best lossless compression ratios now available across a wide variety of test data, according to several benchmarks. A comparison of paq to other compression methods, on a 2GHz T3200, when compressing a large text file: Format Size Time (sec) Memory comp decomp ----------- --------- -------------- ------- Uncompressed 3,152,896 compress 1,319,521 1.6 0.2 .1 MB gzip -9 1,022,810 0.7 0.1 .1 MB bzip2 -9 860,097 0.6 0.4 5 MB p7zip (7z) 824,573 1.5 0.1 195 MB xz -6 822,016 ? ? ? zpaq c1 (fast) 806,959 2 2 38 MB zpaq c2 (mid) 699,191 8 8 112 MB zpaq c3 (max) 644,190 20 20 246 MB The port uses the open ZPAQ specification, and contains: a public-domain C++ API for reading and writing ZPAQ compressed data to or from files or objects in memory; serial and multi-threaded archivers; extra preprocessors for compression; and stubs for creating self-extracting archives.

mod_perl brings together the full power of the Perl programming language and the Apache HTTP server. You can use Perl to manage Apache, respond to requests for web pages and much more. mod_perl gives you a persistent Perl interpreter embedded in your web server. This lets you avoid the overhead of starting an external interpreter and avoids the penalty of Perl start-up time, giving you super-fast dynamic content. As you'd expect from the Perl community, there are hundreds of modules written for mod_perl, everything from persistent database connections, to templating sytems, to complete XML content delivery systems. Web sites like Slashdot and Wired Magazine use mod_perl.

mod_rivet brings together the full power of the Tcl programming language and the Apache HTTP server. You can use Tcl to manage Apache, respond to requests for web pages and much more. mod_rivet gives you a persistent Tcl interpreter embedded in your web server. This lets you avoid the overhead of starting an external interpreter and avoids the penalty of Tcl start-up time, giving you super-fast dynamic content. As you'd expect from the Tcl community, there are hundreds of modules written for mod_rivet, everything from persistent database connections, to templating sytems, to complete XML content delivery systems. Web sites like FlightAware use mod_rivet.

The sortu program is a replacement for the sort and uniq programs. It is common for Unix script writers to want to count how many separate patterns are in a file. For example, if you have a list of addresses, you may want to see how many are from each state. So you cut out the state part, sort these, and then pass them through uniq -c. Sortu does all this for you in a fraction of the time. Sortu uses a hash table and some decent line processing to provide this functionality. For a relatively small number of keys, it can be signifcantly smaller than using sort, because it does not have to keep temporary files. If you are dealing with a large number of unique keys then sortu will run out of memory and stop. Sortu has some basic field and delimiter handling which should do most basic awk or cut features to separate out the field that you are sorting on.

LMDB_File is a Perl wrapper around the OpenLDAP's LMDB (Lightning Memory-Mapped Database) C library. LMDB is an ultra-fast, ultra-compact key-value data store developed by Symas for the OpenLDAP Project. See http://symas.com/mdb/ for details. LMDB_File provides full access to the complete C API, a thin Perl wrapper with an Object-Oriented interface and a simple Perl's tie interface compatible with others DBMs.

The OpenGL Extension Wrangler Library (GLEW) is a cross-platform open-source C/C++ extension loading library. GLEW provides efficient run-time mechanisms for determining which OpenGL extensions are supported on the target platform. OpenGL core and extension functionality is exposed in a single header file. GLEW has been tested on a variety of operating systems, including Windows, Linux, Mac OS X, FreeBSD, Irix, and Solaris. This is the linux verson.

Graphillion is a Python software package on search, optimization, and enumeration for a graphset, or a set of graphs. - Lightweight data structures for handling x-illions of graphs - Search, optimization, and enumerate large and complex graph sets - Efficient implementation extending Python with C/C++ - Working with existing graph tools like NetworkX - Open source MIT license - Well tested: more than 600 unit tests - Fast prototyping, easy to teach, and multi-platform

A multi-channel MPEG encoder, using the ISO13818 standard and the dist10 source code. Multi-channel files may have up to 6 defined channels: Left(L), Right(R), Center(C), Left Surround (LS), Right Surround (RS) and a Low Frequency Enhancement channel (LFE). ISO13818 defines 5 multi-channel modes (on top of the normal stereo mode), each of these modes may have an optional LFE channel: 3/2: L, R, C, LS, RS 3/1: L, R, C, mono surround 2/2: L, R, LS, RS 2/1: L, R, mono surround 3/0: L, R, C The "standard" surround sound encoding of "5.1 channels" is achieved by using mode 3/2 plus an LFE channel. A multi-channel MPEG file should decode OK on any MPEG decoder. If the decoder doesn't recognize the multi-channel extensions, then you'll just get a stereo file containing a down mix of the 5 channels.