Version 2.8.8

• helm-apt have been removed, use helm-system-packages instead.
• Now helm buffers can be displayed in a separate frame if you use emacs-25+ version
  
• Regexps in helm-boring-file-regexp-list have changed see its default value.
  helm-find-files is now faster when helm-ff-skip-boring-files is enabled.
• Various small bug fixes and small improvements as always.

Version 2.8.7

• New command to toggle helm buffer full-frame.
• Allow yanking marked and choosing separator from main action, the third action "append" have been removed.
• Possibility to create new kmacro from marked kmacros.
• Allow toggling mark on more than one candidate with numeric prefix args.

Version 2.8.6

• Allow displaying buffers in separate windows with different window layouts. See helm-window-show-buffers-function and helm-window-prefer-horizontal-split.

• Helm is now advising push-mark if helm-advice-push-mark is non-nil (use customize and not setq).
  The advice is enabled by default, it avoid duplicates in mark-ring and update global-mark-ring with recentest mark. Doing so fixes a bug when using helm with evil see issue #1891.

• New commands to list eshell-prompts namely helm-eshell-prompts and helm-eshell-prompts-all.

• Diverse bug fixes.

Version 2.8.5

• Helm support for addressbook have been removed and moved to own library https://github.com/emacs-helm/helm-addressbook

• Make helm loading faster, this led to several errors with void functions because some libraries where not required but it should have been fixed everywhere.

• Improve helm-ucs, it is now notofu i.e all the characters with no font available are not shown.

• Helm documentation have been improved.

• Allow user switching to buffers vertically if needed.
  Big changes on this are expected on next release specially for switching to many marked buffers in differents window layout.

Version 2.8.4

Short release fixing issue #1844.
Also helm-ucs and helm-bookmark improvements.

Version 2.8.3

• Fix insertion from kill-ring

• Insertion from kill-ring can be done with a prefix arg to exchange
  point and mark

• Allow disabling in-buffer in completing-read

• Rework and improve helm-dabbrev

• Now data slot accept a buffer

• Prevent killing a real buffer when force updating from in-buffer

• Now buffer-name is hidden by default in helm-occur but not
  helm-moccur

• Allow finner settings for fontification in helm-occur/moccur

• Notify async operations (copy/rename etc..) in prompt

• Fix filter in helm-find-files when using helm-ff-skip-boring-files

• Fix helm-boring-file-regexp-list

• Fix preselection in semantic

Version 2.8.2

• Divers eshell improvements
• Org refiling from helm have been improved
• Completion on Dwim directories
• Tramp for emacs-26 have been fixed
• Added more features to query replace on filenames

Version 2.8.1

Mostly bugfixes

Version 2.8.0

• Fixed tramp for emacs-26.
• New feature to create a dired buffer with marked files ready for editing with Wdired.
• Allow inserting marked candidates from eshell completion.
• Various bugfixes

Version 2.7.1

• Allow cycling resume
• Diverses bug fixes
• Known bugs:
  Tramp is no more working with emacs-26 (now fixed in master branch).