Here is an excellent article by Greg Daly in which he lists quite a few instances of Pope emeritus Benedict endorsing the papacy of our current Holy Father, Francis.
The article is two years old, but I've only become aware of it now.
And, given that yesterday was Pentecost, here is a collection of links to St. John Paul II's catechesis on the Holy Spirit, given in his Wednesday audiences between April 1989 and July 1991.
I'd never come across this blog, which is called Totus2us, and which has a UK internet suffix. It looks good, and I look forward to exploring it further.