List of SIP software - Wikipedia

Apr 17, 2020 E-MailRelay On Windows the installation program creates a startup batch file called emailrelay-start.bat that contains all the server command-line options and you can edit this file to change the server configuration. You can also set up your own shortcuts to the E-MailRelay executable and add and remove command-line options using the shortcut properties tab. Open Source Filter | Web Content Filtering System - ClearOS

Technitium DNS Server is an open source tool that can be used for self hosting a local DNS server for privacy & security or, used for experimentation/testing by software developers on their computer. It works out-of-the-box with no or minimal configuration and provides a user friendly web console accessible using any web browser.

May 07, 2017

Its functionality can be expanded with packages like FreeSWITCH, a free/open source software communications platform for making SIP, voice and chat driven products. Secure Computing , SnapGear firewall includes siproxd SIP proxy, Sidewinder 7 firewall includes a SIP proxy

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. It reduces bandwidth and improves response times by caching and reusing frequently-requested web pages. Squid has extensive access controls and makes a great server accelerator. hMailServer - Free open source email server for Microsoft hMailServer is a free, open source, e-mail server for Microsoft Windows. It's used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world. It supports the common e-mail protocols (IMAP, SMTP and POP3) and can …