geteltorito can extract the initial/default boot image from CDs (and ISOs) that follow the El Torito specification for bootable CD-ROMs.

Image data is written to standard output by default and all other information is written to standard error.

cdrdao records audio or data CDs in disk-at-once (DAO) mode, based on a textual description of the contents. This mode writes the complete disc – lead-in, one or more tracks, and lead-out – in a single step and is commonly used with audio CDs. cdrdao can also handle the bin/cue format, commonly used for VCDs or disks with subchannel data.

Asunder is a graphical audio CD ripper and encoder. It can save audio tracks as WAV, MP3, Ogg Vorbis, FLAC, Opus, Wavpack, and Musepack. It can use CDDB to name and tag each track automatically, and it allows for each track to be by a different artist. Asunder can encode to multiple formats in one session, and it can create M3U playlists.

cdrecord converts a CD image in a ".bin / .cue" format (sometimes ".raw / .cue") to a set of .iso and .cdr tracks.

abcde is a front-end command-line utility (actually, a shell script) that grabs tracks off a CD, encodes them to Ogg/Vorbis, MP3, FLAC, Ogg/Speex and/or MPP/MP+ (Musepack) format, and tags them, all in one go.

cdrtools is a collection of command line utilities to create CD's, DVD's or Blue Ray discs. The most important components are cdrecord, a burning program, cdda2wav, a CD audio ripper which uses libparanoia, and mkisofs, which can create various disc images.

Libburn is a library for reading and writing optical discs. Supported media are: CD-R, CD-RW, DVD-RAM, DVD+RW, DVD+R, DVD+R/DL, DVD-RW, DVD-R, DVD-R/DL, BD-R, and BD-RE.

Cdrkit is a suite of programs for recording CDs and DVDs, blanking CD-RW media, creating ISO-9660 file system images, extracting audio CD data, and more. It's mostly compatible with cdrtools.

libudfread is a C library for reading UDF file systems. UDF is a file system mostly used for DVDs and other optical media. It supports read-only media (DVD/CD-R) and rewritable media that wears out (DVD/CD-RW).

DVDStyler is a DVD authoring application which allows users to burn video files in many formats to DVD discs, complete with individually designed menus. It can be used to create professional-looking DVD's with custom buttons, backgrounds and animations, from within a user-friendly graphical interface.

Cdparanoia retrieves audio tracks from CDDA capable CDROM drives. The data can be saved to a file or directed to standard output in WAV, AIFF, AIFF-C or raw format. Most ATAPI, SCSI and several proprietary CDROM drive makes are supported; cdparanoia can determine if the target drive is CDDA capable. In addition to simple reading, cdparanoia adds extra-robust data verification, synchronization, error handling and scratch reconstruction capability.

CDemu is a software suite designed to emulate an optical drive and disc (including CD-ROMs and DVD-ROMs).

Libcddb is a C library to access data on a CDDB server (freedb.org). It allows you to:

1. search the database for possible CD matches;

2. retrieve detailed information about a specific CD;

3. submit new CD entries to the database.

Libcddb supports both the custom CDDB protocol and tunnelling the query and read operations over plain HTTP. It is also possible to use an HTTP proxy server. If you want to speed things up, you can make use of the built-in caching facility provided by the library.

libcdio-paranoia is an implementation of CD paranoia libraries based on libcdio.

CDEmu client is a simple command-line client for controlling CDEmu daemon.

It provides a way to perform the key tasks related to controlling the CDEmu daemon, such as loading and unloading devices, displaying devices' status and retrieving/setting devices' debug masks.

GNU ccd2cue is a preprocessor for CD burning software that allows the conversion of the proprietary CCD format to the CUE format, which is well-supported by free software. These files are commonly distributed with CD images and are used to describe how tracks are laid out on the image.

libMirage is a CD-ROM image access library. It supports the following formats: B6T, C2D, CCD, CDI, CIF, CUE, ISO, MDS, MDX, NRG, TOC. It is written in C and based on GLib. Its aim is to provide uniform access to the data stored in various image formats.

This is a C version of the certdata2pem Python utility that was originally contributed to Debian.

This package provides a certificate store containing only the Let's Encrypt root and intermediate certificates. It is intended to be used within Guix.

mkcert is a simple tool for making locally-trusted development certificates. It requires no configuration.

The deSEC can be used to obtain certificates with certbot DNS ownership verification. With the help of this hook script, you can obtain your Let's Encrypt certificate using certbot with authorization provided by the DNS challenge mechanism, that is, you will not need a running web server or any port forwarding to your local machine.

Check is a unit testing framework for C. It features a simple interface for defining unit tests, putting little in the way of the developer. Tests are run in a separate address space, so Check can catch both assertion failures and code errors that cause segmentation faults or other signals. The output from unit tests can be used within source code editors and IDEs.

Google Test features an XUnit test framework, automated test discovery, death tests, assertions, parameterized tests and XML test report generation.

The googlebenchmark C++ library support the benchmarking of functions, similar to unit tests.