Signal is a messaging app with an unexpected focus on privacy, combined with all the features expected from a modern IM app. Signal has received a lot of praise from all around the world for its security and privacy-respecting technologies.
- - Signal is the most popular Windows, Android, Mac & iPhone alternative to Max99.
- - Signal is the most popular Open Source & free alternative to Max99.
Telegram is a messaging app created by former VK creators with a focus on speed and security. It’s superfast, simple and free. It is like SMS, but more powerful.
- - Telegram is the most popular Web-based & Android Tablet alternative to Max99.
WhatsApp is an iPhone and Android messaging app which allows you to exchange messages without having to pay for SMS.
Facebook Messenger is a faster way to message. Reach friends right on their phones, get and send messages fast, message everyone at once and more.
Facebook Messenger Features
Chat everywhere! IM+ is the most widely used mobile IM app! Connect all-in-one to MSN, Yahoo!, Google Talk, AIM, Jabber, ICQ, Facebook, MySpace and Twitter on ALL popular mobile platforms.
The widest selection of unique features that you won't find in any other IM client!.
KakaoTalk is a phone number based messenger service that allows users anywhere in the world to chat one-to-one or in a group for free. (no SMS service)
Line2 is a VoIP phone service that lets you call & text from a separate phone number via WiFi or 3G/4G/LTE. At a small premium, Text & call ANYONE in the US/Canada, forwarding & more. Pick any phone number.
- - Line2 is the most popular commercial alternative to Max99.
Pinger lets you text and talk free with the people you care about most, anywhere on the planet. Tap a picture and you'll see all of your communications—texts, pics, calls, voicemails—all in one place.
Spotbros is an app where you can discover and share all types of content through public chat groups (Spots) or with your friends through private chats.
GV Connect is an unofficial iPhone/iPod Touch application for Google Voice. It stores your account password securely in your device's keychain for faster logins - communication is done via secure connections (SSL) to the Google Voice servers and no contact information is...
GV Connect Features
Slick is a messenger application for mobile devices. It allows you to chat with your friends connected though various online messaging applications. Currently it is still in development, an alpha version
Photo4tune is a free application that provides a simple way to capture and share the best moments of your life on your Android phone. All the photos you post will appear on the world’s map showing the place they were taken.Discontinued
The apps are no longer updated. Last version, 4.0, released in December 2014, can be still downloaded from the Apple Appstore and Google Play Store