foo2hbpl is an open source printer driver for printers that use the HBPL version 2 wire protocol for their print data, such as the Dell 1355, Fuji Xerox DocuPrint CM205, or the Xerox WorkCentre 6015. These printers are often erroneously referred to as winprinters or GDI printers. However, Microsoft GDI only mandates the API between an application and the printer driver, not the protocol on the wire between the printer driver and the printer. In fact, HBPL printers are raster printers that happen to use a very efficient wire protocol. HBPL is just one of many wire protocols that are in use today, such as Postscript, PCL, Epson, ZjStream, etc. This driver uses Ghostscript to perform all of the heavy lifting (image processing). There are five major components to the foo2hbpl printer driver: foo2hbpl2 (the page image to protocol conversion engine of the driver); foo2hbpl2-wrapper (a shell script (compatible with foomatic) that runs ghostscript and foo2hbpl in a pipeline); icc2ps (converts an ICM color profile to a Postscript CRD, which is then fed into Ghostscript before the users Postscript program); foomatic-db (foomatic database entries that describe the supported printers and their options so that printer spoolers know how to access the printer using foo2hbpl2-wrapper); and hbpldecode (a tool for developers to inspect HBPL streams).
The Middleman System (mdm) is a set of utilities that help you parallelize your shell scripts. Its design is based on ideas from superscalar computer processors: it fetches commands as your script is running, detects potential interference between commands on the fly, and issues commands for execution in parallel as appropriate.
LMDBG is a collection of small tools for collecting and analyzing the logs of malloc/realloc/memalign/free function calls. Unlike many others, LMDBG does not provide any way to detect overruns of the boundaries of malloc() memory allocations, as this is not the goal. Like most other malloc debuggers, LMDBG allows detecting memory leaks and double frees. However, unlike others, LMDBG generates full stacktraces and separates the logging process from analysis, thus allowing you to analyze an application on a per-module basis.
WANsim allows you to simulate (more accurately, emulate) a WAN connection. In particular, it allows a user to change the emulated WAN speed, latency, variation, packet loss, packet duplication, and packet corruption aspects. It is configured as a network bridge that is established at boot time and uses the Linux Kernel NETEM functionality to accomplish its goals. Although relatively well documented, this functionality is not the easiest to use. WANsim wraps it into a simple to use script.
The parallel project allows for simple parallel and distributed processing from shell scripts. In particular, the programs accept lines of shell code on the standard input and run these lines in parallel. The parallelism can be either on the local machine or on a cluster, if a small amount of time is taken to set up SSH. Additionally, the distributed version includes a degree of fault tolerance.
md5chk is a tool for creating MD5 sums. It was designed so that its output would be easy to use with command line shells. It guarantees that the MD5 sum is always "clean" of characters that would be misinterpreted by the shell and that special characters in the file names are always properly escaped.
wv2ogg is a tool that uses wvunpack, oggenc, and vorbiscomment to encode wavpack files to Ogg Vorbis files. The quality setting that will be used for encoding the Vorbis files can be set when running wv2ogg. It will also transfer all tags and replaygain information from the wavpack files to the Ogg Vorbis files by default. wv2ogg was written because no other software that would do this existed for Linux.