Hudson Taylor's Spiritual Secret. Also available as a free download as of March 15, 2012. Recommended by Derek Baker (phenomenal in reminding us of the importance of prayer in missions)
Living the Cross Centered Life: Keeping the Gospel the Main Thing by C. J. Mahaney. Recommended by Ken Z. “A small book, quick read, that reminds me of some very central Gospel truths…a book that I actually re-read once a year. Really has helped me to preach the Gospel to myself and refreshes me in the completed work of Christ and how that applies to my life as well as my ministry to others.”
With a book by Skye Jethani. Recommended by Nathan Garrett. “A transformative book that I would recommend for everyone to read. He does an amazing job at describing the various ways people relate to God and points to the best way – living with God, not for Him, under Him, over Him or from Him. A nice side effect is being more aware of the countless times in the Bible that God relates to His people by saying He is with them.”
The Spiritual Disciplines Handbook by Adele Calhoun. Highly recommended by Beth Eckstein and Lynn Karidis. This book is not meant to be read cover to cover but used as a diagnostic and reference tool. It can help you determine where you are in your spiritual growth and give you practices to grow in those areas.
Pray as You Go > app for daily meditation and contemplative prayer, recommended by Bethany Reedy.
PrayerMate app > a free app for iOS and Android designed to help you pray more faithfully and more widely. It's been a finalist in the Premier Digital Awards several times. Highly recommended by Ken Guenther.
Bible memory app: Remember me > recommended by Ken G. The Remember Me Bible Memory App (for both Apple and Android) is an awesome tool to assist in bible verse memory work. This free* app allows you to choose Bible scriptures you want to memorize. You can play several different games that make Bible memorization easy and FUN! When you’ve mastered a Bible memory verse, the app brings it up for review every few days so you can retain what you’ve learned.
Bible in one year app > Recommended by Beeatrice Tsang. “I have been using this Bible reading plan, and I find many of the devotional sharing are very life nourishing, insightful and thought-provoking. I find them very helpful for keeping my spiritual life vital.”
Faith Comes by Hearing > David Benzel writes, “You can download Bibles in various languages and translations to listen to. You have to sign up to download something (but I've never gotten any mail from them) and they limit how many versions you can download at one time. There is probably about 20 various English options to download (dramatized, etc.). They used to have the NIV but don't anymore. But they do have the ESV.”