Surprisingly, all Logos currently offers in terms of the Westminster Standards are the Larger and Shorter Catechisms and the American Revision of the Confession of Faith. I would love to see the full set, listed here.
Especially:
- Westminster Confession of Faith (original 1646 edition - we still use this in the UK)
- The Directory for the Publick Worship of God
- The Directory for Family-Worship
- The Form of Presbyterial Church Government
- The Confession of Faith of the Kirk of Scotland: Or, The National Covenant
- The Solemn League and Covenant
Not forgetting:
- The Sum of Saving Knowledge (written by David Dickson & James Durham. M'Cheyne converted while reading it).
- To The Christian Reader, Especially Heads of Families
- Mr. Thomas Manton's Epistle to the Reader
They're all available free online (via the first link) but I'd pay to be able to have them in Logos.