Added Social Media and Forum description

As per issue #2984

README.md

@@ -359,7 +359,6 @@ _See also: [Comparison of CalDAV and CardDAV implementations - Wikipedia](https:
 
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-
 ### Communication - Email - Complete Solutions
 
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@@ -503,6 +502,8 @@ Mailing lists servers and mass mailing software - one message to many recipients
 
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+[Social Networking](https://en.wikipedia.org/wiki/Social_networking_service) and [Forum](https://en.wikipedia.org/wiki/Internet_forum) software
+
 - [Abilian SBE](https://github.com/abilian/abilian-sbe) - Open Source Collaboration and Social Networking framework and platform. `LGPL-2.1` `Python`
 - [Anahita](https://www.getanahita.com/) - Open Source Social Networking Framework and Platform. ([Source Code](https://github.com/anahitasocial)) `GPL-3.0` `PHP`
 - [AsmBB](https://board.asm32.info) - A fast, SQLite-powered forum engine written in ASM. ([Source Code](https://asm32.info/fossil/asmbb/index)) `EUPL-1.2` `Assembly`