Is a gem ready for Rails 4 or 5?

Rails 4: 574 ready, 37 not ready, and 436 unknown
Rails 5: 76 ready, 8 not ready, and 963 unknown

Gems ready for Rails 5

Name Status Rails 4 Notes Rails 4 Status Rails 5 Notes Rails 5 Status or notes updated
action_access ready

Built for Rails >= 4.1

ready

Added explicit support for Rails 5.

about 1 year ago
activeadmin ready

since gem version 1.0.0

ready

since gem version 1.0.0

5 months ago
activerecord-import ready

Use activerecord-import 0.4.0 or higher.

source

ready

since version 0.15.0 (https://github.com/zdennis/activerecord-import/blob/master/CHANGELOG.md#changes-in-0150)

3 months ago
activerecord-session_store ready

version 0.0.1 is ready

ready

since gem version 1.0.0

about 1 year ago
active_record_union ready

why not?

ready

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

about 1 year ago
acts_as_paranoid ready

See comment of jonty davis below

ready

0.5.0

about 1 year ago
acts-as-taggable-on ready

since version 2.4.1

ready

since version 4.0.0

about 1 year ago
administrate ready

ok

ready

from https://github.com/thoughtbot/administrate/pull/636

9 months ago
attr_encrypted ready

See Jason's comment below

ready

since version 3.0.2

about 1 year ago
brakeman ready

Tests show that it works under rails '4.0.0.beta1'.

ready

since gem version 3.1.5

about 1 year ago
breadcrumble ready

Breadcrumble 4.0.0 is ready for Rails 4!

ready

since commit https://github.com/ma2gedev/breadcrumble/commit/6a274b9b881d74aa69a8c3cf248fa73bacfd1d46

9 months ago
bullet ready

works

ready

since version 5.2.0

about 1 year ago
bundler ready

Does not depend on rails

ready

Does not depend on rails

5 months ago
cancancan ready

Was started as a semi-official reboot of cancan (which is not yet Rails 4 ready). Work on cancan seems to have stopped, cancancan is Rails 4 ready.

ready

since gem version 1.15.0

9 months ago
choices ready

Does not depend on Rails

ready

does not depended on Rails

4 months ago
clearance ready

from version 1.0.0.rc7 (source)

ready

from version 1.13

about 1 year ago
cloudinary ready

https://github.com/cloudinary/cloudinary_gem/blob/master/cloudinary.gemspec

ready

https://github.com/cloudinary/cloudinary_gem/pull/243

5 months ago
coffee-rails ready

_

ready

since gem version 4.1.1

about 1 year ago
comfortable_mexican_sofa ready

-

ready

since version 1.12.10

9 months ago
database_cleaner ready

since gem version 1.0.0 (source)

ready

since version 1.5.2

about 1 year ago