Free graphical client software for linux

Oracle client is a simplistic Perl-based Oracle client that tries to mimic some of the functionality of PostgreSQL and MySQLs text-based SQL clients.

It is relatively simplistic, but much more useful than dbishell or sqlplus.

The project supports readline, history, desc, and various shorthand commands like d, , c, etc.

Perl MUD Client project is a text-based MUD client supporting SSL, ANSI, telnet negotations, and MCP.

PMC is a text based mudclient written in Perl 5. It utilizes GNU readline, supports SSL, local editing support through MCP (MudClientProtocol), full telnet negotiation support and of course ANSI support if your terminal supports it.

Unlike other mudclients with input line editors/history, it also supports the telnet character mode, which enables it to use e.g. fullscreen applications within a mud (like the xeditor found on some LP Muds).

Ragnarok Online Client project is a client to the Ragnarok online network.
Ragnarok Online Client is a client to the Ragnarok online network, an MMORPG.
This project only provides an API to be able to program a client without having to understand the protocol itself, and to keep up-to-date just by the library.
Enhancements:
- Made it work with current iRO and improved it to be able to stay online until one kills it ... though no user interaction is implemented yet

SOAP::XML::Client is a simple frame work for talking with web services.

This package is the base class for talking with web services, there are specific modules to use depending on the type of service you are calling, e.g. SOAP::XML::Client::DotNet or SOAP::XML::Client::Generic

This package helps in talking with web services, it just needs a bit of XML thrown at it and you get some XML back. Its designed to be REALLY simple to use.

Piorun Jabber Client is a Jabber client for Gnome with user interface simmilar to IRC clients.

Currenly implemented features include: standard chat, multi-user chat, roster and subscriptions management, VCards, privacy lists, secure connections (TLS and SALSL).
Piorun is written using Mono/Gtk#

Reality Cyanide project is a client for Cyanide, a graphical virtual reality multiplayer role-playing game.

Cyanide is intended to be the most dynamic multi-player online role-playing game ever made.

This client uses an isometric perspective to present scenes. It is programmed with Python, pygame (SDL), and OpenGL.

Full 3D movement is possible, and the servers code can be exchanged online.

Oww Client is a graphical client program for One-Wire Weather (Oww) servers. Oww Client is based on GTK+, displaying lists of collected weather data from one or more servers.
Enhancements:
- Owwl was enhanced to include new sensor types (mainly for cryogenic readout).
- A status window was added.
- Reconnexion is now automatic, after the remote server drops it.

MusicBrainz::Client is a MusicBrainz Client API.

SYNOPSIS

use MusicBrainz::Client;
use MusicBrainz::Queries qw(:all);

my $mb = MusicBrainz::Client->new();
if(! $mb->query_with_args( MBQ_FindArtistByName, [ "Pink Floyd" ]) ) {
die("Query failed: ", $mb->get_query_error(), "n");
}
print "Found ", $mb->get_result_int(MBE_GetNumArtists), " artistsn";

This module provides access to the musicbrainz client API using a perl-ish OO interface.