Kaira Jewel Lingo establishes the connection between equanimity and love, and shows that equanimity is anything but indifferent. You can find her article here: How Equanimity Powers Love
Narayan Liebenson discusses the practice of equanimity in the midst of the eight worldly winds that all of us experience: praise and blame, gain and loss, pleasure and pain, and fame and disrepute. You can find that article here: Cultivating Equanimity
Gil Fronsdal provides a good introduction to equanimity and the ways in which it can be developed. Two ways of doing this are learning to see clearly and developing inner balance, both of which are associated with mindfulness practice. You can find his article here: Equanimity