The Bible /Lectionary
At St. Paul's we use the NRSV, and a modern translation in Spanish. At Pentecost and on other occasions, we need texts also in many other languages:

The New Revised Standard Version Online
New International Version in Spanish
Bibles in Many Languages
The Lectionary

Bible Study Tools
The first are excellent sites, including online dictionaries, concordances and commentaries; the third has hundreds of copyright-free Christian books and writings:

Bible Study Tools
Online Concordances
Online Christian Literature
Forward Day By Day (daily meditations)

The Book of Common Prayer
All versions of the BCP up to the current 1979 version, in different formats:

The Book of Common Prayer

Christian Resources
A huge site with links to a bit of everything, but takes some sorting through:

Resource Directory