These sites are for organizations with a broader focus than aging so finding information or news on them will be hit or miss. But they do address various issues confronting the elderly, sometimes with a global focus.
This is a selection of links to think tanks and organizations that address public policy issues such as health care, tax policy, retirement, and the environment and they can help you get a sense of the current debates on certain topics. Where they have a clear political bias (whether liberal or conservative) I have tried to make a note of it.