Casual IBuffer is an opinionated Transient-based porcelain for Emacs IBuffer.

INSTALLATION
(require 'casual-ibuffer) ;; optional
(keymap-set ibuffer-mode-map "C-o" #'casual-ibuffer-tmenu)
(keymap-set ibuffer-mode-map "F" #'casual-ibuffer-filter-tmenu)
(keymap-set ibuffer-mode-map "s" #'casual-ibuffer-sortby-tmenu)

Alternately with `use-package':
(use-package ibuffer
  :hook (ibuffer-mode . ibuffer-auto-mode)
  :defer t)
(use-package casual-ibuffer
  :ensure t
  :bind (:map
         ibuffer-mode-map
         ("C-o" . casual-ibuffer-tmenu)
         ("F" . casual-ibuffer-filter-tmenu)
         ("s" . casual-ibuffer-sortby-tmenu)
         ("<double-mouse-1>" . ibuffer-visit-buffer) ; optional
         ("M-<double-mouse-1>" . ibuffer-visit-buffer-other-window) ; optional
         ("{" . ibuffer-backwards-next-marked) ; optional
         ("}" . ibuffer-forward-next-marked)   ; optional
         ("[" . ibuffer-backward-filter-group) ; optional
         ("]" . ibuffer-forward-filter-group)  ; optional
         ("$" . ibuffer-toggle-filter-group))  ; optional
  :after (ibuffer))

NOTE: This package requires `casual-lib' which in turn requires an update of
the built-in package `transient' ≥ 0.6.0. Please customize the variable
`package-install-upgrade-built-in' to t to allow for `transient' to be
updated. For further details, consult the INSTALL section of this package's
README.