Networking libraries

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Name Developers Platforms License Supported protocols Remarks
lNet Aleš Katona Windows, Linux, macOS, FreeBSD Modified LGPL TCP, UDP, HTTP, HTTPS, FTP, SMTP, TELNET Lazarus/FPC
Synapse Lukas Gebauer Windows, Linux, macOS, FreeBSD BSD style license TCP, UDP, HTTP, HTTPS, FTP, SMTP, SNMP, NTP, POP3, PING, IMAP, LDAP, FTPS, DNS Runs on both Delphi and Lazarus/FPC
Indy team Windows, Linux, macOS, iOS, Android MPL, modified BSD numerous protocols Runs on both Delphi and Lazarus/FPC
Internet Tools Benito van der Zander Windows, Linux, macOS, Android GPL HTTP, HTTPS
IP*Works! team Windows, Linux, macOS Commercial numerous protocols Runs on both Delphi and Lazarus/FPC; requires .NET Framework 2.0 - 4.8.
ICS François Piette Windows Freeware(*) numerous protocols Delphi/FPC. Kylix/FPC is a separate, abandoned codebase

(*) request to send a postcard when used in production.

Web Frameworks

It's actually hard to define what particular functionality a web-framework should provide. At least it should be able to communicate with a web-server OR even provide web-server functionality itself.

The content and a coverage of each framework listed below varies. Some libraries provide functionality that is implemented in other libraries, i.e. HTML creation, database interaction, encryption, handling archive files, while others do not. It's questionable, if such functionality is mandatory for a web-framework.

Library Link Notes
fcl-web FPC packages
ExtPascal GPLv3
Brook LGPLv2.1
mORMot MPLv1.1

GPLv2.0 LGPLv2.1

Fano Framework



The library is based on fcl-web in order to handle the communication.

Provides high level MVC routines.

Comparison by WebServer Communication

Library CGI FastCGI SCGI Apache Module uWSGI
fcl-web Yes Yes No Yes No
ExtPascal Yes Yes No No No
Brook Yes Yes No No No
mORMot Yes Yes No No No
Fano Yes Yes Yes No Yes
Powtils Yes No No No No