If you're interested in classical cryptography, codes, and ciphers, here are some tools for Mac users. They don't solve your cipher, but, like paper and scissors, they help you to solve it. And here are some web-based Crypto scripts in php:

Here's Google's N-gram page.

Here's a page that shows you what information you reveal when you browse.

Photo by Oliver Robinson
Acrostics have been used since the early Middle Ages. St. Augustine of Hippo wrote a psalm using an acrostic. Some poets were far more advanced, hiding messages in pictures. Here's one by Hraban Maur, a ninth-century monk of Fulda in Germany.