I am really upset that you guys are retiring. Are there any other software programs that can do what you guys do? I really liked the function where you can click on a single line (i.e., someone's response to the survey or questionnaire) and put it back into the PDF form. Please let me know.
I'm not sure this is 100% what you're looking for, but at JotForm we just released a Fillable PDF Creator that closely mirrors the functionality enjoyed with Adobe FormsCentral.
As Sara mentioned in her response, there are a few alternatives out there, and JotForm was one of the ones listed in the link she shared. Adobe was gracious to offer a few suggestions, and so far JotForm has migrated over 55,000 FormsCentral forms to us using our one-step, automatic migration tool.
Let me know if there's anything I can answer about making the switch or the features we offer. Looking forward to hearing from you! (chad(at)jotform.com).
Director of Communications, JotForm