Regulazy
I just found a nice little regular expression tool called
Regulazy. It helps generate simple regular expressions based on the text that you select. The following description is from its website
Regulazy is a visual Regex Creation tool for beginners. Easy point and click user interfaces, predictive technology and much more! Still in alpha, but more features are coming!
Haven't seen such a tool before that can analyze text and supply you with a simple regular expression. Don't expect miracles for difficult types of text though.