This omits (or tries to) catechisms already available in Logos. An incomplete list of potential entries:
The Baptist Catechism by the Charleston Association 1813
A Catechism for Babes, or Little Ones by H. Jessey 1652
A Short Catechism about Baptism by John Tombes, 1659
Instruction for the Ignorant, Bunyan's Catechism, 1675
Benjamin Keach's Catechism, 1677
The Orthodox Catechism by Hercules Collins, 1680
The Philadelphia Baptist Catechism
A Catechism For Girls and Boys, by Richard Cecil, 1798
Gadsby's Catechism, 1800
A Catechism or Instructions for Children and Youth by Dan Taylor, 1810 [multiple editions]
The Baptist Scriptural Catechism by Henry Clay Fish, 1850
A Puritan Catechism by Spurgeon 1855 [Logos may have this]
National Baptist Catechism by E. C. Morris, 1855
A Catechism for Little Children by Baptist State Convention of the North Carolina Sunday School and Publication Board, 1864
Compend of Christian Doctrines Held by Baptists: In Catechisms by W. W. Everts, 1866
A Catechism of Bible Teaching by John Broadus, 1892
A Brief Catechism of Bible Doctrine by James P. Boyce
Catechism of the Waldenses
The Catechism of the Episcopal Church
A Catechism of Creation: An Episcopal Understanding
The catechism of the Methodist Episcopal church.: Numbers 1, 2, and 3, in one volume, designed for consecutive study in Sunday schools and families. 1855
Two Short Catechisms by Owen, John
Unitarian catechism by Minot J. Savage, 1890
The Racovian Catechism of 1605
Genevan Catechism by Calvin, 1545
Protestant Reformed Churches Catechisms (contemporary)
Baltimore Catechisms (contemporary)
Basel Catechism by Oecolampadius, 1526
Zurich Catechism by Leo Juda, 1534
Zurich Catechism by Bullinger, 1555
Baptist revision of Heidelberg Catechism by Hercules Collins, 1680