Lightweight alternative to sudo

https://www.keltia.net/programs/calife

GNUstep application for digital still cameras

http://home.gna.org/gsimageapps/

Framework that allows to access digital cameras

http://home.gna.org/gsimageapps/

Cantarell, a Humanist sans-serif font family

https://wiki.gnome.org/Projects/CantarellFonts

Serialization/RPC system

https://capnproto.org/

Audit Cargo.lock for crates with security vulnerabilities

https://rustsec.org/

Cargo C-ABI helpers

https://github.com/lu-zero/cargo-c

Gnome On-Screen keyboard

https://live.gnome.org/Caribou

Managing notes on small cards

Simple tool to analyze noise and distortion of a RF system

https://rfcascade.sourceforge.net/

Monospaced font with programming ligatures

https://github.com/microsoft/cascadia-code

DataStax C/C++ Driver for Apache Cassandra

http://datastax.github.io/cpp-driver/

Highly scalable distributed database

https://cassandra.apache.org/

Highly scalable distributed database

https://cassandra.apache.org/

Header-only test framework for C++

https://github.com/catchorg/Catch2

MS Word/Excel converter to plain ASCII or TeX. TK viewer included

http://www.wagner.pp.ru/~vitus/software/catdoc/

Coin-or Branch and Cut: mixed integer programming solver

https://projects.coin-or.org/Cbc

Reference implementation of the C interface to the legacy Fortran BLAS

http://www.netlib.org/blas/blast-forum/

Tool to minimize the compile time of C/C++ programs

https://ccache.samba.org/

Mark Crispin's C-client mail access routines

https://www.washington.edu/imap/

CDDB client bundle GNUstep

http://gsburn.sourceforge.net/

Compare directories and select files to copy

http://home.hccnet.nl/paul.schuurmans/linux/index.html#xdircmp

CDDA extraction tool (also known as ripper)

https://www.xiph.org/paranoia/

Record CD-R[W]s in disk-at-once mode

http://cdrdao.sourceforge.net/

Command-line CD/DVD writing suite

http://www.cdrkit.org/

CD/DVD/BluRay and ISO-9660 image creation and extraction tools

http://cdrecord.org/

The CELT ultra-low delay audio codec

https://www.celt-codec.org/

Vector graphics tool for GNUstep

http://www.cenon.info/dLinux_gb.html

C++11 library for serialization

https://github.com/USCiLab/cereal

Library for reading and writing files in FITS data format

https://heasarc.gsfc.nasa.gov/docs/software/fitsio/

Cryptographic file system implemented as a user-space NFS server

https://www.bayofrum.net/cgi-bin/fossil/cfs/

Computational geometry library

https://www.cgal.org/

Fast, lightweight web frontend for Git repositories

https://git.zx2c4.com/cgit/about/

Collection of cut generators for COIN-OR packages that use cuts

https://github.com/coin-or/Cgl

Character art facsimile generator

https://hpjansson.org/chafa/

Charis SIL TrueType font collection

http://scripts.sil.org/cms/scripts/page.php?item_id=CharisSILfont

Charis SIL TrueType font collection, compact variant

http://scripts.sil.org/cms/scripts/page.php?item_id=CharisSILfont

Unit test framework for C

https://libcheck.github.io/check/

Find processes that need restarting after an upgrade

https://github.com/Freaky/checkrestart

Photobooth-inspired app for taking pictures and videos from webcam

https://www.gnome.org/projects/cheese/

Feelter thet cunferts Ingleesh text tu Muck Cheenese-a

http://mysite.verizon.net/ebrowne72/chef/index.html

FUSE based filesystem with replication at the filesystem level

https://BSDforge.com/projects/sysutils/fusefs-chironfs/

A utility to quickly check multiple folders for new email

Tool to locally check for signs of a rootkit

http://www.chkrootkit.org/

Library for dealing with Microsoft ITSS/CHM format files

http://www.jedrea.com/chmlib/

AcoustID audio fingerprinting library

https://acoustid.org/chromaprint

Chromium for FreeBSD

http://www.chromium.org/Home

Tool to chroot softwares easily

https://sourceforge.net/projects/chrootsafe/

Tool to modify DT_RPATH in existing ELF binaries

Synchronise computer clock to CHU radio station

https://www.rossi.com/chu/