Recommended
https://www.drupal.org/project/layout_builder_usage_reports
Check which sections/blocks are used in layouts.
https://www.drupal.org/project/gin_lb
Gin support for layout builder.
Popular
https://www.drupal.org/project/layout_builder_restrictions
Restrict access to layout builder sections and blocks.
https://www.drupal.org/project/layout_builder_restrictions_by_role
Global settings for layout_builder_restrictions.
https://www.drupal.org/project/layout_builder_styles
Define styles to apply to sections and blocks.
https://www.drupal.org/project/layout_builder_modal
Edit blocks in a modal.
https://www.drupal.org/project/layout_library
Pre-defined layouts.
Bootstrap
https://www.drupal.org/project/bootstrap_layout_builder
https://www.drupal.org/project/bootstrap_styles
https://www.drupal.org/project/layout_builder_blocks
Other
https://www.drupal.org/project/layout_builder_lock
Lock layout sections to allow overrides of none or specific sections.
https://www.drupal.org/project/layout_builder_block_sanitizer
Clean up missing blocks.
https://www.drupal.org/project/ui_patterns_layout_builder
Integrate UI Patterns module.
https://www.drupal.org/project/ui_patterns_settings
Configure UI Pattern settings.
https://www.drupal.org/project/component_blocks
UI Patterns with layout builder.
https://www.drupal.org/project/layout_builder_ids
Add section and block ids. Overlaps with layout_builder_component_attributes.
https://www.drupal.org/project/layout_builder_save_and_edit
Add a save and edit layout button to content.
https://www.drupal.org/project/layout_builder_iframe_modal
Edit layout builder components in iframe, using admin theme.
https://www.drupal.org/project/layout_section_classes
Similar to layout_builder_styles.
Sections and Components
https://www.drupal.org/project/layout_paragraphs
Layout builder but only for paragraphs on the entity.
https://www.drupal.org/project/paragraph_blocks
Place paragraphs in layout builder.
https://www.drupal.org/project/layout_builder_component_attributes
Add classes and attributes to blocks.
https://www.drupal.org/project/layout_builder_base
Configure sections with display options.
https://www.drupal.org/project/layout_builder_kit
Pre-made components.
https://www.drupal.org/project/layout_builder_bgcolor
Section background color.
https://www.drupal.org/project/lb_anchor_nav
Provides a menu and config to add blocks in the layout to it.
https://www.drupal.org/project/lb_default_blocks
Provide layout positions for custom blocks, to be created by authors after deployment.
https://www.drupal.org/project/layout_bg
Layout plugin base for background options.
https://www.drupal.org/project/lb_section_navigation
Similar to lb_anchor_nav.
https://www.drupal.org/project/lb_flipcard
Flipcard layout.
https://www.drupal.org/project/layout_builder_tabs
Tabs layout.
https://www.drupal.org/project/layoutcomponents
Many components and extra features.
https://www.drupal.org/project/section_library
Reusable section templates.
https://www.drupal.org/project/block_title_link
Can be used to link block titles.
UI Enhancements
https://www.drupal.org/project/layout_builder_operation_link
Add a layout operation (link) to access from content admin.
https://www.drupal.org/project/layout_builder_browser
Add images to blocks to make selection in layout builder easier.
Misc features like open in modal, easier inline blocks.
https://www.drupal.org/project/layout_builder_admin_theme
Use admin theme for editing layout. Useful when your theme is not supported.
https://www.drupal.org/project/layout_builder_additions
Layout operation (similar to layout_builder_operation_link).
Add block simplifications.
https://www.drupal.org/project/layout_builder_widget
Edit layout on edit form.
https://www.drupal.org/project/layout_builder_customizer
Layout operation, layout block quick links, disable option for custom entity layout.
https://www.drupal.org/project/layout_builder_simplify
Improve list of blocks - collapse lists. Breaks create custom block.
https://www.drupal.org/project/layout_builder_quick_add
Turn add block button into widget to select block.
https://www.drupal.org/project/layout_builder_dialog_control
Edit sections/blocks in dialog or off canvas.
https://www.drupal.org/project/lb_claro
Claro support for layout builder.
https://www.drupal.org/project/lb_direct_add
UI enhancements for adding custom blocks.
https://www.drupal.org/project/layoutbuilder_extras
Sidebar drag button. Autosave. Save and edit. Placeholders like lb_default_blocks.
https://www.drupal.org/project/block_list_override
Remove blocks from layout builder list.
https://www.drupal.org/project/entity_browser_block
Use entity browser in layout builder?
https://www.drupal.org/project/media_library_form_element
Use media library in layout builder?
Experimental
https://www.drupal.org/project/layout_builder_extra_templates
Template suggestions based on active theme.
https://www.drupal.org/project/responsive_layout_builder
Define blocks for different breakpoints.
https://www.drupal.org/project/dashboards
Build dashboards with layout builder.
https://www.drupal.org/project/mini_layouts
Blocks with a custom layout.
https://www.drupal.org/project/layout_styles
Similar to layout_builder_styles.
https://www.drupal.org/project/dynamic_layouts
Create reusable layouts.
https://www.drupal.org/project/layout_custom_section_classes
Add classes and attributes to sections.
https://www.drupal.org/project/layout_content
Create layout sections via the UI.
https://www.drupal.org/project/layout_options
Define section options via yaml.
https://www.drupal.org/project/css_grid
Grid section options.
https://www.drupal.org/project/block_library
Show icons on blocks.
https://www.drupal.org/project/block_style_plugins
Add styles to all blocks, including layout builder.
https://www.drupal.org/project/layout_builder_boolean
Conditional display
https://www.drupal.org/project/lb_settings_report
Related
https://www.drupal.org/project/page_manager
Take over other routes, like views pages.
https://www.drupal.org/project/entity_form_field_label
Rewrite field labels in layout builder.
https://www.drupal.org/project/inline_block_title_automatic
Set block title from tokens to hide custom block titles.
https://www.drupal.org/project/views_layout
Use layout sections for views display.
Needs review
https://www.drupal.org/project/layout_builder_asset
https://www.drupal.org/project/lightning_layout
https://www.drupal.org/project/entity_reference_layout
https://www.drupal.org/project/layout_builder_dialog_control
https://www.drupal.org/project/layout_kit
https://www.drupal.org/project/layout_settings
https://www.drupal.org/project/layout_builder_perms
https://www.drupal.org/project/grid_layout
https://www.drupal.org/project/lb_everywhere
https://www.drupal.org/project/flexible_layout
https://www.drupal.org/project/single_row_layouts
https://www.drupal.org/project/shifting_layout_blocks
https://www.drupal.org/project/layoutcomponents
https://www.drupal.org/project/component_builder
https://www.drupal.org/project/layout_builder_reorder
https://www.drupal.org/project/layout_section_fields
https://www.drupal.org/project/layoutbuilder_search_api
https://www.drupal.org/project/layout_builder_shortcuts
https://www.drupal.org/project/lbl
https://www.drupal.org/project/layout_builder_overrides
https://www.drupal.org/project/layout_builder_animations
https://www.drupal.org/project/lb_plus
https://www.drupal.org/project/layout_builder_view_block
https://www.drupal.org/project/layout_builder_ipe
https://www.drupal.org/project/layoutbuilder_extras_view_mode_selector
https://www.drupal.org/project/text_field_formatter
https://www.drupal.org/project/context_stack
Deprecated
https://www.drupal.org/project/layout_builder_extras
Replaced with layoutbuilder_extras.
https://www.drupal.org/project/lb_ux
UI enhancements, possibly unmaintained.