TextMe might be a bit more popular than Zoiper. We know about 2 links to it since March 2021 and only 2 links to Zoiper. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
If you are looking to save money voip.ms + zoiper.com + data only SIM $15-30/m. Source: over 1 year ago
I've been using Zoiper. I used to use Linphone but ran into some issues. Zoiper has a good feature set, and desktop clients as well, so I picked up a license for a reasonable price. Source: almost 2 years ago
GoogleFU says this looks to be what you are after or at least similar https://go-text.me/. Source: 12 months ago
On your phone download TextMe and create an account for it. Your textme phone number has to be in the US state where you're shipito address is (well maybe not but again, for safety's sake). Unfortunately it's not free to get a US number,but it's on sale now, I think it's like $2. (I don't know if there's any other app like this that's free, but this worked for me.). Source: about 3 years ago
Linphone - Linphone is an internet phone or Voice Over IP phone (VoIP).
TextNow - TextNow is a mobile virtual network operator (MVNO) that provides a free phone service to users by using other cellular networks coverage.
MicroSIP - MicroSIP is a free portable SIP softphone for Windows based on PJSIP stack.
Dingtone - Dingtone is a free call and texting application for making unlimited calls and text messages to any number at the moment registered in any part of the world by any cellular company.
Sipdroid - Free and open-source SIP/VoIP Client
Textnow.com - It lets you text your friends, aka my only source of happiness