Broken in but none the worse for wear, Bootstrap and Bootstrap Alternate have OpenType features that substitute a unique pair of distressed 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 also support Eastern European Latin and Baltic languages.
This fonts are authors' property, and are either shareware, demo versions or public domain. The licence mentioned above the download button is just an indication. Please look at the readme-files in the archives or check the indicated author's website for details, and contact him if in doubt. If no author/licence is indicated that's because we don't have information, that doesn't mean it's free.