Compare Business VoIP Phone Service Providers Use the VoIP Savings Tool to view your savings by switching to a business VoIP phone system instantly. VoipReview lets you compare hundreds of business VoIP service providers so that you can cut business costs. Use the VoIP Savings Tool to view your savings by switching to VoIP instantly. Try It Now Sponsored Listing Refine your search Translations English (1) French (1) License OSI-Approved Open Source (1) GNU General Public License version 2.0 (1) Programming Language C (1) C++ (1) Python (1) Status 1 - Planning (1) OS Grouping and Descriptive Categories (1) Linux (1) Mac (1) Windows (1) Firewalls Software Sort By Name Most Popular Last Updated Name Rating Showing page 1 of 1 in Programming Language: Assembly × OS: OS Independent (Written in an interpreted language) × 3ff hardened gateway 3ff aims to provide a full features gateway for home or small office use. This distro is totaly modular and try to be secure as possible.