Boraphone - Free browser-based international calls with no app needed. Pay for what you use

Make international calls directly from your browser — no app, no account required. Boraphone lets you call landlines and mobile numbers worldwide using a simple pay-per-use credit system, perfect for calling banks, embassies, customer support lines, and government offices from anywhere.

Link
https://www.boraphone.com/

Hunter's comment
Boraphone is a browser-based VoIP tool that lets you call any phone number internationally without installing anything. Just open the site, top up credits, and call. Ideal for expats, travelers, and anyone who needs to reach a landline abroad without a local SIM or a monthly subscription.