Is a gem ready for Rails 4 or 5?

Rails 4: 583 ready, 38 not ready, and 435 unknown
Rails 5: 95 ready, 10 not ready, and 951 unknown
Name Status Rails 4 Notes Rails 4 Status Rails 5 Notes Rails 5 Status or notes updated
wicked ready

travis build

ready

for sure from version 1.3.0

over 2 years ago
money-rails ready

Tested in rails upto 4.2.6

ready

from version 1.7.0

over 2 years ago
exception_notification ready

since 4.0.0.rc1

ready

from version 4.2.0

over 2 years ago
minitest-rails ready

yes

ready

from 3.0.0 https://github.com/blowmage/minitest-rails/blob/master/CHANGELOG.rdoc#300--2016-07-01

over 2 years ago
rails-dom-testing ready

yes

ready

from 2.0.0 https://github.com/rails/rails-dom-testing/releases

over 2 years ago
active_record_union ready

why not?

ready

According to changelog ready from 1.2.0 https://github.com/brianhempel/active_record_union#changelog

over 2 years ago
pg ready

Does not depend on Rails

ready

Does not depend on Rails

over 2 years ago
hyperkit ready

It works!

unknown over 2 years ago
drafting ready

see readme

ready

see readme

over 2 years ago
keepr ready

see readme

ready

see readme

over 2 years ago
acts_as_paranoid ready

See comment of jonty davis below

ready

0.5.0

over 2 years ago
squeel ready

Support for ActiveRecord 4.0.0 added in version 1.1.0 (source)

not ready

see https://github.com/activerecord-hackery/squeel/issues/412

over 2 years ago
newrelic_rpm ready

_

ready

since version 3.15.0

over 2 years ago
database_cleaner ready

since gem version 1.0.0 (source)

ready

since version 1.5.2

over 2 years ago
gon ready

_

ready

since version 6.0.1

over 2 years ago
attr_encrypted ready

See Jason's comment below

ready

since version 3.0.2

over 2 years ago
rack-oauth2 ready

_

ready

since version 1.2.2

over 2 years ago
kaminari ready

_

ready

since version 0.17.0

over 2 years ago
doorkeeper ready

since 0.7.0 https://github.com/applicake/doorkeeper/blob/master/CHANGELOG.md#070

ready

since version 4.0.0

over 2 years ago
state_machines-activerecord ready

_

ready

since version 0.4.0

over 2 years ago