You could have downloaded rangtel 1.0 from our software library for free. The following version: 1.0 was the most frequently downloaded one by the program users. The program's installer file is generally known as rangtel.exe. The program is included in Communication Tools. The actual developer of the free program is Rangtel INC.
From the developer:
RangTel is dedicated to provide a high quality VoIP calls for low prices throughout the world.
RangTel uses the latest technology and its high quality voice network ensures customers to get the best communication services. RangTel provides full 60 Sec/Min, No connection fee, No hidden charges, No PIN number to dial, No interruption or disconnection and our achievement is 100% customer satisfaction.
You may want to check out more software, such as TapiRex Plugin: Solutio Charly, DWmail Notifier or Thoys' SL Bot, which might be similar to rangtel.