Catholic Relief Services ("CRS") is contributing to the disaster relief following the devastating Myanmar cyclone. Funds provided by CRS are going through Caritas Internationalis, which is working in the most affected areas according to an article posted by CRS. CRS accepts donations online. Click on the "Donate now" link on the home page of the Catholic Relief Services website.
Caritas Internationalis has more on its website. Caritas is a confederation of 162 Catholic relief, development and social service organizations in over 200 countries and territories.
Network for Good lists CRS and other relief agencies that are assisting in the relief effort, with links to donate to them online.
CNN article: "Limited Cyclone Aid Begins Moving."