Walkie - Walkie is an online communication providing software that allows you to remain in touch with the other persons.
Zoho Meeting - Free video conferencing, online meeting, desktop sharing solution from Zoho.
Slack Voice Chat by Standuply - Easily record and send voice messages on Slack 🗣️
FileFlex - FileFlex: Access Share Stream developed and published by Qnext.
Cord - One tap voice chat
Airtime - Hang out with group video, share music & videos