No.
Manual examination revealed little similarities in code structure. Not content with that, I decided to also verify it algorithmically.
I used Sherlock for testing. Specifically I did this:
git clone https://github.com/rails/activeform
git clone https://github.com/apotonick/reform
./sherlock -t 10% `find activeform -name *.rb` `find reform -name *.rb` \
| grep activeform | grep reform >results.txt
There are a few false positives and a few similarities between tiny tests. That is all.
| activeform/test/dummy/app/forms/user_form.rb and reform/test/contract_test.rb: 14% | |
| activeform/test/dummy/app/forms/user_form.rb and reform/test/dummy/app/forms/album_form.rb: 16% | |
| activeform/test/dummy/config/application.rb and reform/test/dummy/config/application.rb: 14% | |
| activeform/test/dummy/config/initializers/filter_parameter_logging.rb and reform/test/dummy/config/application.rb: 25% | |
| activeform/test/dummy/config/environments/development.rb and reform/test/dummy/config/environments/development.rb: 17% | |
| activeform/test/dummy/config/environments/production.rb and reform/test/dummy/config/environments/production.rb: 16% | |
| activeform/test/dummy/config/environments/test.rb and reform/test/dummy/config/environments/test.rb: 32% | |
| activeform/test/forms/user_with_email_and_profile_form_fixture.rb and reform/test/contract_test.rb: 14% | |
| activeform/test/forms/user_with_email_and_profile_form_fixture.rb and reform/test/dummy/app/forms/album_form.rb: 16% | |
| activeform/test/forms/user_with_email_form_fixture.rb and reform/test/contract_test.rb: 14% | |
| activeform/test/forms/user_with_email_form_fixture.rb and reform/test/dummy/app/forms/album_form.rb: 16% |