what are the countries that participates with the reciprocity law for nurses

What do you mean abut a reciprocity "law" - I do not know of one that that can cross national borders, only state borders.

As far as nurses from the Philippines working in other nations, that is handled on a nation by nation basis.

if it wud make sense, you can apply an interim permit here in the US. you can use the permit within six months. but if you take the nclex-rn exam and you didn't pass it (during the six-month period) the permit will lose its validity. but im not sure if it's applicable to those not in the country. just so you know

That is not necessarily true for all states here in the USA for US grads. And if the OP does not currently have a working Visa for the USA, they are seriously affected by retrogression, especially being from the Philippines. There are nurses from Philippines that have been waiting 5 or more years to immigrate to work in the USA, under green card status. Thus getting a license is more difficult, but finding a legal way to work here with it is the bigger problem.

A few people immigrate on an H1B, but that is extremely limited and very very few facilities, as well as very few nurses qualify for them.

While some states and facilities in the USA may allow citizens and legal residents (with Visa that permits working here) with graduation from a US accredited program to work during the Interim permit, I know of none that do that for those from foreign programs/those without Visa that permits working. Anyone graduating from a nonUS program - the BONs require time to assess the quality and the completeness of their program, and may test language skills before issuing a license. Most states also require a SSN - something difficult for a noncitizen to get. And again, unless the individual has legal permit to work in the USA, there is the long wait for permits to work in the USA, well beyong the 6 month period.

Thus there is no general "reciprocity" like within the US states. And the states that do permit "Interim" permit, still require even US grads to test NCLEX and I can pretty well figure that no US facility will even begin processing a foreign grad without them passing the NCLEX .

Much the same issue with working in the EU. The current recession has most nations severely limiting immigration of nurses.

There is no country you could practice in without writing their licensing exams first to obtain a nursing license in that country.

You mean kinda like diplomatic immunity, but for nurses?

Gawd, I hope such a thing doesn't exist.

I know that a few individuals have posted here before that their home country doesn't have a licensing exam for nurses, licenses are issued solely on the basis of acceptable education. That may be what the OP is referring to. I believe, if I'm remembering correctly, that Viet Nam was one of those countries -- that's the only one I can recall by name, although I know I've read about this more than once here.