Free server using software for linux

Net::Server is an extensible, general Perl server engine.
SYNOPSIS
#!/usr/bin/perl -w -T
package MyPackage;
use Net::Server;
@ISA = qw(Net::Server);
sub process_request {
#...code...
}
MyPackage->run(port => 160);
exit;
Main features:
- Single Server Mode
- Inetd Server Mode
- Preforking Simple Mode (PreForkSimple)
- Preforking Managed Mode (PreFork)
- Forking Mode
- Multiplexing Mode using a single process
- Multi port accepts on Single, Preforking, and Forking modes
- Simultaneous accept/recv on tcp, udp, and unix sockets
- Safe signal handling in Fork/PreFork avoids perl signal trouble
- User customizable hooks
- Chroot ability after bind
- Change of user and group after bind
- Basic allow/deny access control
- Customized logging (choose Syslog, log_file, or STDERR)
- HUP able server (clean restarts via sig HUP)
- Dequeue ability in all Fork and PreFork modes.
- Taint clean
- Written in Perl
- Protection against buffer overflow
- Clean process flow
- Extensibility
Net::Server is an extensible, generic Perl server engine. Net::Server combines the good properties from Net::Daemon (0.34), NetServer::Generic (1.03), and Net::FTPServer (1.0), and also from various concepts in the Apache Webserver.
Net::Server attempts to be a generic server as in Net::Daemon and NetServer::Generic. It includes with it the ability to run as an inetd process (Net::Server::INET), a single connection server (Net::Server or Net::Server::Single), a forking server (Net::Server::Fork), a preforking server which maintains a constant number of preforked children (Net::Server::PreForkSimple), or as a managed preforking server which maintains the number of children based on server load (Net::Server::PreFork). In all but the inetd type, the server provides the ability to connect to one or to multiple server ports.
Net::Server uses ideologies of Net::FTPServer in order to provide extensibility. The additional server types are made possible via "personalities" or sub classes of the Net::Server. By moving the multiple types of servers out of the main Net::Server class, the Net::Server concept is easily extended to other types (in the near future, we would like to add a "Thread" personality).
Net::Server borrows several concepts from the Apache Webserver. Net::Server uses "hooks" to allow custom servers such as SMTP, HTTP, POP3, etc. to be layered over the base Net::Server class. In addition the Net::Server::PreFork class borrows concepts of min_start_servers, max_servers, and min_waiting servers.
Net::Server::PreFork also uses the concept of an flock serialized accept when accepting on multiple ports (PreFork can choose between flock, IPC::Semaphore, and pipe to control serialization).

GTK-server enables access for shellscripts & interpreted programming languages to apps using either GTK 1.x or 2.x.

GTK-server project is a standalone binary, which is able to communicate by a 2-way pipe or by a TCP/UDP port. The script invokes this binary, sets up a pipe or a TCP/UDP connection and prints the GTK call in plain text to the pipe or socket. The GTK-server then sends information back which can be used in the program or script.

Below a summary of advantages when using the GTK-server:

- No need to learn C or C++, you can stick to your favorite programming language
- No need to hack the source of existing programming languages to realize GUI programming
- High flexibility in creating GUIs, e.g. not limited to dialogs
- Full GTK API available, the user can extend the gtk-server.cfg file by himself
- Access to both GTK 1.x and GTK 2.x
- Convenient GTK test tool, easy to learn GTK programming.

Linx Kiss Server project was primarily intended for personal purpose. I couldnt make any of available kiss linux servers work with my new Kiss DP-600 player in a way I would imagine so I found kissd simple kiss daemon by Alexandre Becoulet which is really simple and clear code to understand and fixed it up and added some more features.
Linux Kiss Server (LKS) works with Kiss DP-600 but I think it should work with any other Kiss player as well.
Main features:
- makes selected direcotory accessible for Kiss player
- can run either as a daemon or in foreground
- can answer Kiss player queries for PC-LINK server
- can disable UDP binding at all (doesnt respond to Kiss player looking for PC-LINK server queries)
- can overide default server port
Enhancements:
- A problem with zombie processes when the opening of files failed was fixed.
- TIME_WAIT sockets are now closed correctly.
- Events are now logged using syslog when the server is run in daemon mode.

CrossFTP Server is a professional FTP Server for multiple platforms. It is a high-performance, extremely configurable, and most of all a secure FTP server. CrossFTP Server has an easy-to-use GUI for user to configure the servers behavior.
Main features:
- 100% pure Java, free, open source FTP server.
- Multi platform support and multithreaded design.
- User virtual directory, write permission, idle time-out and upload/download bandwidth limitation support.
- You can monitor all the user activities.
- Anonymous login support.
- Both upload and download files are resumable.
- Handles both ASCII and binary data transfers.
- IP restriction support to allow/ban IPs.
- Database and LDAP can be used to store user data.
- All the FTP messages are customizable.
- Implicit/explicit SSL/TLS support.
- MDTM support - your users can change the date-time stamp of files.
- "MODE Z" support for faster data upload/download.
- Easy installation/update by Java Web Start technology.

httptype is a program that returns the http host software of a website. It is written in Perl.
httptype reads a list of http hosts and optionally the port number for each of these. It queries each host, displaying the type of HTTP server running on that host. It reads the http_proxy and no_proxy environment variables to determine whether to use a proxy or not.
httptype reads a list of http servers and, optionally, the port number for each of these. It then queries each of the hosts and displays the HTTP server software of the host.
Input may be read from a host file if specified using the --hosts switch:
httptype --hosts [hostfile]
If hostfile is omitted or `-, httptype reads from standard input. See Format of host file for more info.
A single host may be queried by passing its name on the command line:
httptype host [port]
If port is omitted, 80 is used.
If no host file is specified through the --hosts file and no host is specified on the command line, httptype will read the list from standard input. See Format of host file for more info.
httptype will read the http_proxy environment variable and try to determine if a proxy server is being used. This setting may be overridden using the --proxy switch:
httptype --proxy proxyhost[:proxyport]
If proxyport is omitted, 80 is used.
If the proxy server is `none, no proxy is used. This is typically used to prevent httptype from using the proxy server specified by http_proxy. The --noproxy switch can be used to achieve the same.
Additionally, you may use the no_proxy environment variable to specify a comma delimited list of hosts for which httptype should not use the proxy. If httptype comes across any of these hosts, it will make a direct connection to them.
Enhancements:
- made 1.3.8 stable and renamed to 1.2.3

Free Pascal Web Unit allows you to write binary CGI programs in easy and comfortable way.
If you need binary server pages and you know Pascal, PSP (Pascal Server Pages) will help you. Let the Pascal be multiplatform web programming language with PSP and Free Pascal Compiler!
Simple Data Storage (SDS) includes several functions to work with electronic tables. It will help you if you cant use database server but if you have to store data somewhere. SDS - a bit more comfortable way to store your data than plain text!
Main features:
- Recieve POST, GET variables and Cookies.
- Filter incoming data.
- Use HTML templates.
- Set and Delete Cookies.
- Use Sessions to hold private user data.
- Get dates in string format.
- Use configuration files.
- Protect data with encrypting functions.
- Send e-mail Messages.
- Store data in electronic tables.
- Upload files to server.
Enhancements:
- Minor bugfixes and feature enhancements.

RIPE Whois Server provides support for domain records and lookups.

This is a whois database server. The RIPE Whois server uses a backend SQL database to allow support for very large repositories. There is support for IPv6 records and lookups. Both RPSL and RIPE181 are supported.