DNN - DotNetNuke

Open source content manager

Habari

Easy-to-use CMS with a sober design

Drupal

Manage the publications of your web page

BuddyPress

Create a social network on your WordPress blog

WordPress.com

The CMS par excellence arrives on the desktop

Embed Facebook

Embed Facebook contents within WordPress pages

SilverStripe

Manage web contents with an easy-to-use CMS

Disqus

Blog and webpage comment system

Textpattern

CMS manager for webpages

Mambo

A complete content management system

e107

Powerful open source CMS

CMS Made Simple

Create your personal blog on the Internet

Oxite

Microsoft's alternative to WordPress

blogBuddy

Publish your blog with this desktop client

Newscoop

Online CMS for information professionals

Simple Machines Forum

Create and manage your own Internet forum

imo

Talk to your friends from your PC

LINE

Instant messaging from your PC

WhatsApp Messenger

The official version of WhatsApp for Windows

QQ International

The messaging application to communicate at global level

Messenger for Desktop

Facebook Messenger on your Windows desktop

WA Web Plus

An extension to use WhatsApp Web with more functions

Facebook Messenger

Chat with your contacts from your desktop

WhatSender

Send multiple WhatsApp messages from your PC

Telegram Messenger

Telegram's desktop client for Windows

Signal

Instant messaging and chat app that guarantees anonymity

WeChat

The Windows version of the popular Chinese messaging app

Telefuel

Alternative Telegram client focused on productivity for PCs

IMVU

Instant messaging and chats in 3D environments

WhatsApp Viewer

Tool to view WhatsApp chats on PC

Windows Live Messenger

The departed Messenger by Microsoft