Monal IM is described as 'Monal is an XMPP/Jabber IM client. It can connect to any standard XMPP chat server such as Gtalk or Facebook chat. Notable features:' and is an app in the Social & Communications category. There are more than 25 alternatives to Monal IM for a variety of platforms, including Mac, Linux, Android, Windows and iPhone. The best alternative is Telegram, which is free. Other great apps like Monal IM are Jitsi (Free, Open Source), Pidgin (Free, Open Source), Conversations (Free, Open Source) and Trillian (Freemium).
Jitsi (previously SIP Communicator) is an audio/video and chat communicator with full encryption that supports protocols such as SIP, XMPP/Jabber, ICQ/AIM, Windows Live, Yahoo!, GTalk/Hangouts extensions, as well as OTR, ZRTP, etc.
Pidgin is an easy to use, multi-protocol chat client client used by millions. Connect to AIM, MSN, Yahoo, XMPP, and more chat networks all at once. It has built-in support for NSS, offering client-to-server message encryption for protocols that support it.
Conversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved easy encryption [OTR, OMEMO, or GPG]. [Note] **You can download the compiled apk for free from F-Droid**: ...
Trillian is an instant messaging app that works on phones, tablets, and desktops while keeping your chats neatly synchronized between all of them! We think conversation should be easily shared between all of your devices, not trapped as text messages on your phone.
ChatSecure is a free and open source messaging app that features OTR encryption over XMPP. You can connect to your existing accounts on Facebook or Google, create new accounts on public XMPP servers(including via Tor), or even connect to your own server for extra security.