Free communication skills software for linux

Ice, the Internet Communications Engine, is middleware for the practical programmer. A high-performance Internet communications platform, Ice includes a wealth of layered services and plug-ins. Ice means simplicity, speed, and power.
Ice is available under the terms of the GNU General Public License (GPL). Commercial licenses are available for customers who wish to use Ice with proprietary products. Please contact sales@zeroc.com for more information.
Ice is currently available for C++, Java, C#, Visual Basic, Python, and PHP, and is supported on various operating systems. Additional operating systems and languages will be supported in future releases.
Ice consists of the following packages:
Slice The Specification Language for Ice. Slice establishes a contract between clients and servers, and is also used to describe persistent data.
The Slice Compilers Tools to compile from Slice into target languages, such as C++ and Java, or to automatically generate documentation from Slice files.
Ice The Ice core library. Among many other features, the Ice core library manages all the communication tasks using a highly efficient protocol (including protocol compression and support for both TCP and UDP), provides a flexible thread pool for multi-threaded servers, and additional functionality that supports extreme scalability with potentially millions of Ice objects.
IceUtil A collection of utility functions, such as Unicode handling and thread programming. (C++ only.)
IceBox An application server specifically for Ice applications. IceBox can easily run and administer Ice services that are dynamically loaded as a DLL, shared library, or Java class.
IcePack A sophisticated server activation and deployment tool. With IcePack, the complex task of deploying applications in a heterogeneous computer network is dramatically simplified. Simply write a deployment descriptor in industry-standard XML, and IcePack handles the rest.
Freeze Freeze provides automatic persistence for Ice servants. With just a few lines of code, an application can incorporate a highly-scalable evictor that efficiently manages persistent objects.
FreezeScript It is common for persistent data types to change, especially in large software projects. In order to minimize the impact of these changes, FreezeScript provides inspection and migration tools for Freeze databases. The tools support an XML-based scripting capability that is both powerful and easy to use.
IceSSL A dynamic SSL transport plug-in for the Ice core. It provides authentication, encryption, and message integrity, using the industry-standard SSL protocol.
Glacier One of the most difficult challenges for object middleware systems is security and firewalls. Glacier, the firewall solution for Ice, greatly simplifies the deployment of secure applications. Glacier authenticates and filters client requests and allows callbacks to the client in a secure fashion. In combination with IceSSL, Glacier provides a powerful security solution that is both non-intrusive and easy to configure.
IceStorm A messaging service with support for federation. In contrast to most other messaging or event services, IceStorm supports typed events, meaning that broadcasting a message over a federation is as easy as invoking a method on an interface.
IcePatch A patching service for software distributions. Keeping software up-to-date is often a tedious task. IcePatch automates updating of individual files as well as complete directory hierarchies. Only files that have changed are downloaded to the client machine, using efficient compression algorithms.
Enhancements:
- Various additions, including redundant IceGrid registries.

Inter-Thread Communication (ITC) aims to make it exceedingly easy to call functions in other threads.
The lexer does all the work, so just run the lexer on your headers, then call the stub functions.
In addition, it also provides a complete threading API, with the four threading primitives and a high speed threadsafe FIFO class.
Enhancements:
- It add support for GCC 4.x, and the build system is fixed.

Plutimikation is a math learning game for children. It trains basic calculation skills like multiplication in the number range between 1 and 100.
Its simple, it works and my daughter likes it. Its free software written for the KDE desktop.
Enhancements:
- First public release: Plutimikation 0.1.

The RealizationEngine is designed from the ground up to facilitate group communication and collaboration.
It will store that communication to built and manage an institutional knowledge base. It is accessible from any Web browser or Web-enabled device.
Classified information is easily restricted to authorized individuals. Information can be compartmentalized, restricted, or published openly, as appropriate, all from the same system.
Ideas are coherently threaded, and every message is searchable in a single location and in the context of the messages related to it.
Main features:
- Communication base (completely replace e-mail or even Lotus Notes)
- Collaboration
- Idea Management
- Project Management
- Intranet
- Extranet
- Virtual meetings
- Online communities
- Virtual companies
- One or all of the above in a single installation

skill sends signals to processes given any combination of user names, ttys, commands, and pids and snice changes the priority of processes (given the same).
They are similar to kill(1) and renice(8), but the commandline is order-independent. There are also verbose, search, and interactive modes of operation.
Both programs run under a variety of operating systems, including:
Apple Darwin 5.4
AT&T SysVR4, SysVR4.2, SysVR4.2MP
4.2BSD, 4.3BSD, 4.4BSD (and many PC variants)
Cygwin 1.5 (uses Linux)
Mach 2.6, 3.0
DEC Ultrix 2.2, 4.1-2
DEC AXP OSF/1
DEC/Compaq Tru64 Unix V3.2D-2, T3.2F-1, V4.0, V5.0-1B
Encore UMAX 4.2
FreeBSD 2.0-2, 3.1, 4.4-11, 5.0-3, 6.0-1
HP-UX 6.5, 7.0, 8.0, 9.0-5, 10.1-20, 11.0-23
IBM AIX 3.1-2, 4.1, 5.2
IBM AOS 4.3
Linux 1.0-2, 2.1, 2.2, 2.4
MIPS UMIPS 2.1
NeXT OS 1.0, 2.1
NetBSD 1.3-5
OpenBSD 2.6, 3.0
Pyramid OSx 4.0
SCO UnixWare 7.0.1
SGI Irix 3.3, 4.0, 5.2, 5.3, 6.2, 6.5
Sequent Dynix 3.0-1
SunOS 2, 3, 4.0-1, 5.1-10
Enhancements:
- skill and snice now act on each process only once (for systems like BSD that return the same Process ID multiple times, once for each instantiated thread).
- Support has also been added for FreeBSD 6.2 and HP-UX 11.31.

system-config-printer configures a CUPS server. The project uses the CUPS API (bound to Python with pycups) to do this.
The communication with the server is performed using IPP. As a result, it is equally able to configure a remote CUPS server as a local one.
Enhancements:
- Some fixes have been made for saving unapplied changes, and the "job-hold-until" attribute can now be set.