While poking through various Russian threads to find out about calleasy.com,
I found out about a new (to me) Betamax price comparison site.
http://backsla.sh/betamax is well known, but as a big table it can be a bit
cumbersome.
I found
http://progx.ch/?ln=3
Hover over 'VOIP' for a list of options. You can:
Compare call or SMS costs
List Betamax access numbers over lots of brands
Make calls from a URL (you have to give them your username and password and
they mangle it into the Betamax web control panel call request. Personally
I wouldn't risk this)
For the cost comparison, you can select which countries you're interested in
and only show those (it seems to remember this in a cookie, so you can go
back and check easily another time). They also send emails and RSS if rates
on particular countries change.
Theo