Gabbr is described as 'messaging app available on android. Schedule your messages to be sent at a later date. It allows you to send messages, photos, video documents, and voice' and is an app in the Social & Communications category. There are more than 100 alternatives to Gabbr for a variety of platforms, including Android, iPhone, Windows, Android Tablet and Mac. The best alternative is Telegram, which is free. Other great apps like Gabbr are Signal (Free, Open Source), Jitsi (Free, Open Source), Matrix.org (Free, Open Source) and Tox (Free, Open Source).
An alternative Telegram client based on TDLib, with higher speed, slicker animations and experimental features. The goal of Telegram X is to reinvent Telegram and explore new frontiers in speed, ease of use, quality of animations and all other aspects.
ICQ is one of the oldest instant messengers. First developed by the Israeli company Mirabilis, sold to AOL, sold again and currenly owned by the Russian "mail.ru" group (known for one of the largest social networks).
Kosmi is a free real time application and communication platform that offers voice, text and video calls along with games and applications such as SNES Party, NES Party, OpenArena, Poker, Virtual Cardtables, Synced YouTube and Cowatch Video.
FluffyChat is an open, nonprofit and cute matrix messenger app for Ubuntu Touch, Android and iOS. Open Opensource and open development where everyone can join. Nonprofit FluffyChat is donation funded. Cute ? Cute design and many theme settings including a dark mode.
A spin-off of the popular Jabber/XMPP client Conversations with automatic contact discovery. Sign up with your phone number and Quicksy will automatically—based on the phone numbers in your address book—suggest possible contacts to you.