It appears that WhatsApp is widely used in la rep dom. For those who may not know you can have WhatsApp on your pc. You just install WhatsApp for the web and you are good to go. Only thing your phone must be connected to the app. It doesn't work like Voxer for the web where you can actually turn your phone off and still send Voxer messages. I much prefer Voxer but WhatsApp is the DR way to go.
https://web.whatsapp.com/
https://web.whatsapp.com/