GPL-2.0-or-later — independent software & tools
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bwm-ng
Console-based live network and disk I/O bandwidth monitor
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cadaver
Command-line client for DAV
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calceph
C library to access the binary planetary ephemeris files
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carla
Audio plugin host supporting LADSPA, LV2, VST2/3, SF2 and more
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cattle
Brainfuck language toolkit
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ccal
Create Chinese calendars for print or browsing
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ccd2iso
Convert CloneCD images to ISO images
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ccheck
Check X509 certificate expiration from the command-line, with TAP output
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ccrypt
Encrypt and decrypt files and streams
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cd-discid
Read CD and get CDDB discid information
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cdargs
Directory bookmarking system - Enhanced cd utilities
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cddlib
Double description method for general polyhedral cones
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cdogs-sdl
Classic overhead run-and-gun game
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cdpr
Cisco Discovery Protocol Reporter
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cdrdao
Record CDs in Disk-At-Once mode
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center-im
Text-mode multi-protocol instant messaging client
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certgraph
Crawl the graph of certificate Alternate Names
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cfv
Test and create various files (e.g., .sfv, .csv, .crc., .torrent)
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cgdb
Curses-based interface to the GNU Debugger
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cgoban
Go-related services
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cgrep
Context-aware grep for source code
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cgvg
Command-line source browsing tool
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chadwick
Tools for manipulating baseball data
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checkbashisms
Checks for bashisms in shell scripts
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chkrootkit
Rootkit detector
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chocolate-doom
Accurate source port of Doom
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chrpath
Tool to edit the rpath in ELF binaries
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chuck
Concurrent, on-the-fly audio programming language
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cidrmerge
CIDR merging with network exclusion
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cksfv
File verification utility
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clamav
Anti-virus software
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clifm
Command-line Interface File Manager
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clipsafe
Command-line interface to Password Safe
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clisp
GNU CLISP, a Common Lisp implementation
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cln
Class Library for Numbers
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cloc
Statistics utility to count lines of code
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clpbar
Command-line progress bar
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clzip
C language version of lzip
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cmus
Music player with an ncurses based interface
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colordiff
Color-highlighted diff(1) output
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colormake
Wrapper around make to colorize the output
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colortail
Like tail(1), but with various colors for specified output
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connect
Provides SOCKS and HTTPS proxy support to SSH
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convertlit
Convert Microsoft Reader format eBooks into open format
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convmv
Filename encoding conversion tool
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corkscrew
Tunnel SSH through HTTP proxies
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cp2k
Quantum chemistry and solid state physics software package
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cpl
ISO-C libraries for developing astronomical data-reduction tasks
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cppp
Partial Preprocessor for C
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cpulimit
CPU usage limiter
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cram
Functional testing framework for command-line applications
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crispy-doom
Limit-removing enhanced-resolution Doom source port based on Chocolate Doom
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cvs-fast-export
Export an RCS or CVS history as a fast-import stream
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cvsutils
CVS utilities for use in working directories
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cwb3
Tools for managing and querying large text corpora with linguistic annotations
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daemon
Turn other processes into daemons
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dar
Backup directory tree and files
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darcs
Distributed version control system that tracks changes, via Haskell
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dasm
Macro assembler with support for several 8-bit microprocessors
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davmail
POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway