You can find more than 46 thousands of community-contributed Drupal extensions (modules, themes, distributions and translation) on https://www.drupal.org/download and hundreds of Backdrop add-ons (modules, themes and layouts) on https://backdropcms.org/add-ons.
For ease of navigation the below list contains some of Drupal and Backdrop extensions and add-ons that AltaGrade team has been developing, contributing and/or maintaining and that we recommend to our customers and all Drupal and Backdrop users.
Activity Calendar
Project page: https://backdropcms.org/project/activity_calendar Issues: https://github.com/backdrop-contrib/activity_calendar/issues?q=is:issue Used by: 1 Backdrop website
Ajax markup
Project page: https://backdropcms.org/project/ajax_markup Issues: https://github.com/backdrop-contrib/ajax_markup/issues?q=is:issue Used by: 7 Backdrop websites
Brush
Project page: https://backdropcms.org/project/brush Issues: https://github.com/backdrop-contrib/brush/issues?q=is:issue Used by: 0 Backdrop website
BUEditor
Project page: https://backdropcms.org/project/bueditor Issues: https://github.com/backdrop-contrib/bueditor/issues?q=is:issue Used by: 65 Backdrop websites
Collapsible
Project page: https://backdropcms.org/project/collapsible Issues: https://github.com/backdrop-contrib/collapsible/issues?q=is:issue Used by: 6 Backdrop websites
Custom Error
Project page: https://backdropcms.org/project/customerror Issues: https://github.com/backdrop-contrib/customerror/issues?q=is:issue Used by: 19 Backdrop websites
Project page: https://www.drupal.org/project/discount_campaign Issues: https://www.drupal.org/project/issues/discount_campaign?status=All Used by:
FAQ Field
Project page: https://backdropcms.org/project/faqfield Issues: https://github.com/backdrop-contrib/faqfield/issues?q=is:issue Used by: 3 Backdrop websites
Invite
Project page: https://backdropcms.org/project/invite Issues: https://github.com/backdrop-contrib/invite/issues?q=is:issue Used by: 1 Backdrop website
Language Icons
Project page: https://backdropcms.org/project/languageicons Issues: https://github.com/backdrop-contrib/languageicons/issues?q=is:issue Used by: 30 Backdrop websites
Markdown Editor for BUEditor
Project page: https://backdropcms.org/project/markdowneditor Issues: https://github.com/backdrop-contrib/markdowneditor/issues?q=is:issue Used by: 8 Backdrop websites
Menu Attach Block
Project page: https://backdropcms.org/project/menu_attach_block Issues: https://github.com/backdrop-contrib/menu_attach_block/issues?q=is:issue Used by: 11 Backdrop websites
Multiple E-mail Addresses
Project page: https://backdropcms.org/project/multiple_email Issues: https://github.com/backdrop-contrib/multiple_email/issues?q=is:issue Used by: 1 Backdrop website
Nice messages
Project page: https://backdropcms.org/project/nicemessages Issues: https://github.com/backdrop-contrib/nicemessages/issues?q=is:issue Used by: 16 Backdrop websites
Node CSS
Project page: https://backdropcms.org/project/node_css Issues: https://github.com/backdrop-contrib/node_css/issues?q=is:issue Used by: 1 Backdrop website
Paragraphs jQuery UI Accordion
Project page: https://backdropcms.org/project/paragraphs_jquery_ui_accordion Issues: https://github.com/backdrop-contrib/paragraphs_jquery_ui_accordion/issues?q=is:issue Used by: 77 Backdrop websites
Poll
Project page: https://backdropcms.org/project/poll Issues: https://github.com/backdrop-contrib/poll/issues?q=is:issue Used by: 20 Backdrop websites
Profile Switcher
Project page: https://backdropcms.org/project/profile_switcher Issues: https://github.com/backdrop-contrib/profile_switcher/issues?q=is:issue Used by: 11 Backdrop websites
Protected Forms
Project page: https://backdropcms.org/project/protected_forms Issues: https://github.com/backdrop-contrib/protected_forms/issues?q=is:issue Used by: 22 Backdrop websites
Project page: https://www.drupal.org/project/protected_submissions Issues: https://www.drupal.org/project/issues/protected_submissions?status=All Used by:
Quote
Project page: https://backdropcms.org/project/quote Issues: https://github.com/backdrop-contrib/quote/issues?q=is:issue Used by: 4 Backdrop websites
Search Index Wipe
Project page: https://backdropcms.org/project/searchindex_wipe Issues: https://github.com/backdrop-contrib/searchindex_wipe/issues?q=is:issue Used by: 1 Backdrop website
Project page: https://www.drupal.org/project/search_index Issues: https://www.drupal.org/project/issues/search_index?status=All Used by:
Search Index Options
Important note: This feature is now included in Backdrop core, so you no longer need this module.
Project page: https://backdropcms.org/project/search_index_options Issues: https://github.com/backdrop-contrib/search_index_options/issues?q=is:issue Used by: 10 Backdrop websites
Search Krumo
Project page: https://backdropcms.org/project/search_krumo Issues: https://github.com/backdrop-contrib/search_krumo/issues?q=is:issue Used by: 11 Backdrop websites
Shortcut
Project page: https://backdropcms.org/project/shortcut Issues: https://github.com/backdrop-contrib/shortcut/issues?q=is:issue Used by: 44 Backdrop websites
Simplenews
Project page: https://backdropcms.org/project/simplenews Issues: https://github.com/backdrop-contrib/simplenews/issues?q=is:issue Used by: 82 Backdrop websites
Smart Menu Options
Project page: https://backdropcms.org/project/smart_menu Issues: https://github.com/backdrop-contrib/smart_menu/issues?q=is:issue Used by: 46 Backdrop websites
SSH public keys
Project page: https://backdropcms.org/project/sshkey Issues: https://github.com/backdrop-contrib/sshkey/issues?q=is:issue Used by: 1 Backdrop website
State Override
Project page: https://backdropcms.org/project/state_override Issues: https://github.com/backdrop-contrib/state_override/issues?q=is:issue Used by: 1 Backdrop website
Project page: https://www.drupal.org/project/stickynote Issues: https://www.drupal.org/project/issues/stickynote?status=All Used by:
Sticky Note
Project page: https://backdropcms.org/project/stickynote Issues: https://github.com/backdrop-contrib/stickynote/issues?q=is:issue Used by: 3 Backdrop websites
Webform multiple file
Project page: https://backdropcms.org/project/webform_multiple_file Issues: https://github.com/backdrop-contrib/webform_multiple_file/issues?q=is:issue Used by: 0 Backdrop website