When I want to find something special about Bitcoin I usually search through resources collected here: https://www.lopp.net/

There is a lot of websites presented that will be usefull for everyone: users, developers, miners, exchange owners, etc.

In particular, for developers you can visit these:

https://www.lopp.net/bitcoin-information/technical-resources.html

https://www.lopp.net/bitcoin-information/developer-tools.html

https://www.lopp.net/bitcoin-information/podcasts.html

https://www.lopp.net/bitcoin-information/blogs.html

https://www.lopp.net/bitcoin-information/books.html