Nmap ("Network Mapper") is a utility for network exploration, administration, and security auditing. It uses IP packets in novel ways to determine which hosts are available online (host discovery), which TCP/UDP ports are open (port scanning), and what applications and services are listening on each port (version detection). It can also identify remote host OS and device types via TCP/IP fingerprinting. Nmap offers flexible target and port specifications, decoy/stealth scanning for firewall and IDS evasion, and highly optimized timing algorithms for fast scanning.
ntopmg is a network probe that shows network usage in a way similar to what top does for processes. It acts as a Web server, creating an HTML dump of the network status. It sports a flow collector, an HTTP-based client interface for creating ntop-centric monitoring applications, and RRD for persistently storing traffic statistics. Its C++ core can be scripted in Lua, for changing the appearance and extending functionality.
nxtvepg is a decoder and browser for Nextview, a subscription-free electronic TV program guide in the analog domain. Nextview EPG currently is broadcast in Germany, Austria, Switzerland, Belgium, France, and Turkey, and it covers the schedules of all major TV networks in these countries. nxtvepg is an X11 application with a GUI based on Tcl/Tk and uses video4linux or BSD bktr drivers for data acquisition through a TV tuner card.
ocicpplib is a C++ library to communicate with Oracle RDBMS through OCI. It features a JDBC-like interface to Oracle. The goal of the OCI C++ Library is to provide a simple interface to Oracle. It features support for Oracle 8 and 8i, BLOB/CLOB support, ROWID, REFCursor's and Nested Tables.
The Easysoft ODBC-ODBC Bridge allows applications on one machine to access ODBC data sources on another. It supports multiple concurrent connections from multiple clients to multiple target databases. The principle application is to enable access from Linux and Unix platforms to remote ODBC databases. For example, Apache/PHP programs on Linux can read/write data held on MS SQL Server on Windows, and Perl programs can read/write data held in a MS Access database. Supported applications include Applixware, Open Office, Python, Rexx/SQL, mnGoSearch, OpenLDAP, and Oracle sqlplus. Supported platforms include Linux, MacOSX, IBM zSeries, Windows and various Unix flavors.
OMNeT++ is a C++-based object-oriented Discrete Event Simulation framework, primarily targeted at the simulation of communication networks and other parallel/distributed systems. It includes a graphical network editor, a network topology description language, a rich simulation class library, multiple execution environments (both GUI and command line), a result plotting tool, detailed documentation, many sample simulations, and much more.
omniORB is an Object Request Broker (ORB) which implements version 2.6 of the Common Object Request Broker Architecture (CORBA). It supports the C++ and Python language bindings, is fully multithreaded, uses IIOP as the native transport, and comes complete with a COS Naming Service. omniORB is one of the fastest available C++ ORBs.
Oberon2 is a simple and safe object-oriented language created by N.Wirth, the author of Pascal and Modula2. It is statically strongly typed and has garbage collection. Most of good ideas incorporated in design of Java were in Oberon2 long before. OOC is an open source project to produce a family of optimizing Oberon2 compilers. The compiler with an ANSI C back-end, oo2c, is quite mature, and provides a complete and convenient Oberon2 development environment. It comes with a rather comprehensive standard library, Code Navigator, and an Emacs mode. It is easy to call C functions and libraries from Oberon2.