Phone line for Businesses or Individuals. Ring4 provides companies with a cloud solution to manage phone lines as simply as they manage emails. The Ring4 work on any iOS or Android device and can be managed via the Admin Console. Ring4 phone numbers are mobile and support unlimited texting, unlimited calling, voicemail and call recording. Ring4 starts at $9.99/month/line.
Burner - Disposable phone numbers -- now with MMS photo support
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Shuffle - One Phone, Multiple Numbers
MIT App Inventor - App Inventor is a cloud-based tool, which means you can create apps for phones or tablets right in your web browser.
Listen - A smart phone number
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.