Showing 341–360 of 1,000 ranked alternatives.
Jason Torres
Play siren sounds and save as ringtone
Play pranks or annoy friends with customizable loud sound effects. Choose from police , burglar alarms, ship , and truck . Save sounds as ringtone, notification, or alarm. Trigger sounds with a single button press.
Hippo Camp Software Ltd.
Call groups via mesh network
Enable voice via LE devices. Connect multiple devices to form a mesh network for extended range. Send messages and participate in with up to 16 users. Supports hands-free kits for outdoor activities.
Belledonne communications
Open source internet phone and messaging.
The app provides free audio and video calls, along with text messaging. Users can receive calls and messages even when the app is not actively running, provided an internet connection is available.
Sprint Nextel Corporation
Talk instantly with group or one-to-one calls
Enable push-to-talk communications on Apple devices. Make 1-to-1 and group calls. Control calls via touchscreen. with devices. Manage call settings and permissions.
Simple Phone Company
Make calls over data or WiFi
Make and receive calls over data or WiFi worldwide. Use internet instead of minutes. Enable extension-to-extension calling. Add a direct number via Platform. Connect to .co accounts.
Ringleader, Inc
Send encrypted messages and calls
Make and receive calls and send texts to any mobile or landline number globally. Use end-to-end encryption for secure communication. Integrate with RingLeader account for business use.
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