This website has comprehensive lists of drones strikes, who they killed and who fired them. It has excellent data on civilian casualties and is easy to navigate.
Not only does this provide reliable lists of drone strikes and crashes, it also stays up-to-date with drones appearing in the media or in parliament, providing detailed reports on them.
A great array of pictures and resources.
Reprieve campaign about on many issues, but mainly around the death penalty. An excellent place for that kind of context to drone warfare. Great also for general interest.