Speaking in Tongues

1 Corinthians 14 and "Speaking in Foreign Languages" 
1 Corinthians 13:1 - Tongue of Angels

Related Written by Others We do not necessarily agree with all conclusions presented.

Glossolalia: Speaking in Tongues
So You Want to Speak in Tongues
Speaking in Tongues (pdf)
Tongues and Other Gifts of the Spirit
Glossolalia (Tongues-Speaking): What Are Its Implications? 
Should Christians be Speaking in Tongues?
Should Christians Speak in Tongues?
The Speaking in Tongues Controversy
Tongues of Fire Profitless and Profitable Service
Speaking-With-Tongues Delusion
Restiturion, Faith Healing, Prayer Cures and The Gift of Healing
Decently and In Order
The Spirit of a Sound Mind
Characteristics of a Sound Mind
The Teacher and the Lesson