Broken in but none the worse for wear, Bootstrap™ and less distressed companion Bootstrap Alternate each use OpenType features to automatically substitute a unique pair of characters when any upper or lower case letter is keyed twice in a row, as well as features for Old Style Numerals and Small Caps. Both fonts are available as a set or individually:
Pick up the Bootstrap family bundled with the Applewood and Buckboard families, 8 classic wood type fonts for $79 http://crtv.mk/hiyM
Purchase and use of this product is subject to terms of the Aerotype Software License Agreement http://www.aerotype.com/license.html