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Introduction
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The most commonly used Drupal 7 features are being added into Backdrop core.

Backdrop hopes to be a complete and feature-rich product, right out of the box. Many features that are used by the majority of websites have been moved into Backdrop core. Below you'll find a list of contributed modules that are no longer necessary to add to a Backdrop site. Some of these modules have been moved directly into core, some have been integrated into existing core modules, and still others have been reworked or rewritten with Backdrop's philosophy in mind -- usually to address performance or usability issues.

Modules now added into Backdrop core, or no longer necessary include the following:

  1. Admin Menu (moved into core, renamed to Admin Bar module in v1.0)
  2. Block Class (integrated into System module in v1.0)
  3. Blockify (added page elements as blocks in v1.7)
  4. Btester Custom Block Content* (added hero block in v1.5 and contact block in v1.12)
  5. Caption Filter (integrated into CKEditor module n v1.2)
  6. Chaos Tools (integrated into various System modules in v1.0)
  7. CKEditor (moved into core in v1.2)
  8. CKEditor Link (internal link option added to CKEditor in v1.7)
  9. CKEditor Media Browser* (browser added to CKEditor in 1.11)
  10. CKEditor Upload (image uploads included as of v1.0, file uploads as of v1.10)
  11. Comment Closer (merged into Comment module in v1.10)
  12. Contact Block (contact block added in v1.12)
  13. Context (replaced by Layout in v1.0)
  14. Date* (partially moved into core in v1.2 - Date Repeat remains in contrib)
  15. Diff* (diff engine included as part of Configuration Management in v1.0)
  16. Direct Upload (added better image/file upload options in v1.7)
  17. Display Suite (replaced by Layout module in v1.0)
  18. Elements (integrated into System module in v1.0)
  19. Email (moved into core in v1.2)
  20. Email Registration (feature included since v1.0)
  21. Entity API (merged into System module in v1.0)
  22. Entity View Mode (merged into Field UI module in v1.6)
  23. Features* (partially replaced by Configuration Management in v1.0)
  24. Field as Block (per-field blocks were added in v1.3)
  25. Field Formatter Settings (merged into v1.13)
  26. File Entity* (partially integrated into File module in v1.0 + v1.6)
  27. HTML5 Tools (integrated into System modules in v1.0)
  28. Image Mobile Camera (support to upload images via mobile cameras was added in v1.4)
  29. IMCE WYSIWYG Bridge (replaced by CKEditor and System module in v1.2)
  30. Insert (integrated into CKEditor module in v1.2)
  31. Instant Filter (integrated into System modules in v1.0)
  32. Libraries API (not needed, libraries in Backdrop are bundled into modules)
  33. Link (moved into core in v1.2)
  34. Live Preview (better content preview added in v1.11)
  35. Menu Block (integrated into System & Menu modules v1.5)
  36. Menu Translation (menus became translatable in v1.10)
  37. Module Filter* (partially integrated into System module in v1.0)
  38. Nice Menus (replaced by System menus in v1.5)
  39. Node Block (provided by Node module in v1.5)
  40. Options Element (integrated into Field module in v1.12)
  41. Page Preview* (better content preview added in v1.11)
  42. Panels (replaced by Layout module in v1.0)
  43. Panels Everywhere (replaced by Layout module in v1.0)
  44. Pathauto (integrated into Path module in v1.1)
  45. Project Browser (integrated into System module in v1.4)
  46. Radix Layouts* (10 of the Radix layouts were added to core in v1.4)
  47. Redirect (moved into core in v1.4)
  48. Role Assign (integrated into User module in v1.6)
  49. Scheduler (merged into node in v1.10)
  50. Smartmenus  (replaced by System menus in v1.5 + v1.6)
  51. Strongarm (replaced by Configuration Management in v1.0)
  52. Superfish Menus (replaced by System menus in v1.5)
  53. Token (integrated into System module in v1.1)
  54. Transliteration (integrated into System module in v1.3)
  55. UUID* (used for blocks in Layouts as of v1.0)
  56. Media* (partially replaced by CKEditor and System modules in v1.0)
  57. Variable (replaced by Configuration Management in v1.0)
  58. Vertical Tabs Responsive (vertical tabs were made responsive in v1.2)
  59. Views (moved into core in v1.0)
  60. Views Bulk Operations (integrated into System modules in v1.0)
  61. Views Responsive Grid (Views grids use CSS Grid as of v1.12)
  62. WYSIWYG (replaced by CKEditor module in v1.2)

A * above indicates that there may be features included in the D7 version of the module that were not moved to core for Backdrop. For example: Date repeat (a sub-module for Date in D7) is still in contrib for Backdrop CMS.