Info-ZIP portable compression/archiver utilities (Zip, UnZip, WiZ, etc.)
A portable, multi-platform, command-line driven graphing utility
A famous scientific plotting package, features include 2D and 3D plotting, a huge number of output formats, interactive input or script-driven options, and a large set of scripted examples.
Disk Inspection and Monitoring
smartmontools contains utility programs (smartctl, smartd) to control/monitor storage systems using the Self-Monitoring, Analysis and Reporting Technology System (S.M.A.R.T.) built into most modern ATA and SCSI disks. It is derived from smartsuite.
Versatile Commodore Emulator
VICE is an emulator collection which emulates the C64, the C64-DTV, the C128, the VIC20, practically all PET models, the PLUS4 and the CBM-II (aka C610). It runs on Unix, MS-DOS, Win32, OS/2, Acorn RISC OS, BeOS, QNX 6.x, Amiga, GP2X or Mac OS X machines.
Dos2Unix / Unix2Dos - Text file format converters
dos2unix includes utilities to convert text files with DOS or MAC line breaks to Unix line breaks and vice versa. It also includes conversion of UTF-16 to UTF-8.
AA means Ascii Art - the AAlib (ascii art GFX library), BB (audiovisual demonstration for your terminal), aview (image browser/animation player), AAvga (SVGAlib wrapper for AA-lib), ttyquake (text mode quake), aa3d (random dot stereogram generator)...
NetHack is a popular single player dungeon exploration game that runs on a wide variety of computer systems.
Mikmod is a module player and library supporting many formats, including mod, s3m, it, and xm. Originally a player for MS-DOS, MikMod has been ported to other platforms, such as Unix, Macintosh, BeOS, and Java(!!)
XPaint is a simple paint program for X, suitable for producing simple graphics. It does offer some advanced features such as image processing functions and gradient fill. XPaint was originally written by David Koblas.
JWasm is a Masm-compatible assembler. It supports 16-, 32- and 64-bit code, instructions up to AVX and various output formats. It's written in C.
A multi-format module player and library
xmp is a module player for Unix-like systems that plays over 90 mainstream and obscure module formats from Amiga, Atari, Acorn, Apple IIgs and PC, including Protracker (MOD), Scream Tracker 3 (S3M), Fast Tracker II (XM) and Impulse Tracker (IT) files.
A portable version of the ARJ archiver, available for a growing number of DOS-like and UNIX-like platforms on a variety of architectures.
TinyFugue, aka "tf", is a flexible, screen-oriented MUD client, for use with any type of text MUD.
BEYE (Binary EYE) is a free, portable, advanced file viewer with built-in editor for binary, hexadecimal and disassembler modes. It contains a highlight AVR/Java/i86-AMD64/ARM-XScale/PPC-64 and other disassembler, full preview of MZ,NE,PE,ELF and other.
CuTest lets you write unit tests for your C code. You should use it because: (1) It has the cutest name, (2) It looks and feels like JUnit, (3) It is cross-platform, (4) It ships in a single .c and .h file for ease of deployment.
GLE is a library of C functions that draw extruded surfaces, including surfaces of revolution, sweeps, tubes, polycones, polycylinders and helicoids. GLE uses the OpenGL(R) API to perform the actual rendering.
CSL is a programming language with C syntax and comprehensive libraries. The compact scripting engine can also be embedded into your own applications as a powerful macro language.
YSM is a simple ICQ client based on the v7/v8 icq protocol version. Free of external libraries requirements, written in the C Language.
Wcd is another Norton Change Directory (NCD) clone. Wcd is a command-line program to change directory fast. It includes a full screen interactive directory tree browser with speed search and a fast way to choose between multiple matches.
zimg generates png / jpeg images from arbitrary formatted 2-D ascii or binary data. zimg is a command line tool and suitable for rendering large amounts of 2-D data. zimg is highly configurable via command line switches and dynamically loadable objects.
Multiuser BBS/Internet Server Software for multiple platforms including Windows and Linux (legacy versions maintained for DOS and OS/2). Multithreaded modular C/C++ project that includes Telnet, FTP, and Mail servers and support for popular DOS doorgames.
icsdrone is an interface between a chess server and a chess engine
icsdrone acts as an interface between an ICS (Internet Chess Server) and a chess engine supporting the XBoard/WinBoard protocol. Unlike XBoard/WinBoard it does not use a graphical interface so it is suitable for use on embedded systems. icsdrone was originally developed for FICS (the Free Internet Chess Server) by Henrik Gram but currently ICC (the Internet Chess Club) works as well. Some features - "Daemon mode" (run in background). - Auto reconnection in case of network problems. - Builtin support for using timeseal. - An ICS proxy. When instructed via the "proxy" option, icsdrone acts as a proxy for the ICS it is connected to. This is similar to using xboard with zippy but now the "GUI" (xboard/winboard) can be closed without terminating the engine.
pfcalc is a pipe friction calculator using the Darcy-Weisbach equation. gpfcalc is a Gtk front-end for pfcalc. Qpfcalc is a Qt front-end for pfcalc.
yaSSL, or yet another SSL, is an embedded ssl library for programmers building security functionality into their applications and devices. yaSSL is highly portable, and runs on standard as well as embedded platforms(QNX, ThreadX, VxWorks, Tron) yaSSL is still available but no longer being developed. Current development on the same project continues under wolfSSL. Visit yaSSL Home above for the latest stable release.