If you are a graphic designer or an interaction designer and have ever been tasked with creating a style guide or UI guidelines document (both are different and I’ve had the pleasure to work on both of them creating templates and the actual documents for brands and products), this list should help you out as a consolidated list of references.

This list is going to be constantly updated (and will ultimately be a monster list, it’s quite modest for now) of publicly accessible style guides and UI guideline documents on the web. If you find any links not working or would like to suggest one that is not on the list, feel free to comment and let me know.

1. 3M logo standards (website, partial public access)
   
2. ABB Brand Identity (website, partial public access)
   
3. ACDSee Brand Style Guide (PDF download)
   
4. Airbnb style guides
5. Air Products Identity Standards (website, partial public access)
   
6. Ameritech Graphical User Interface Standards and Design Guidelines (PDF, 1370 kb)
   
7. AMAIA Residence Brand Manual (PDF, 816 kb)
   
8. Android User Interface Guidelines (website)
   
9. Apple OSX Human Interface Guidelines (website)
   
10. Apple iOS Human Interface Guidelines (website)
    
11. Barbican Visual Identity (website with PDF download)
    
12. BBC Future Media Standards & Guidelines (website)
    
    
13. BBC Global Experience Language (GEL) (website)
    
    
14. Belfast Zoo Brand guidelines
15. Blackberry and RIM wireless handheld UI Developers Guide (PDF, 1.3 mb)
16. BlackBerry Branding Guidelines (PDF, 300 kb)
17. Brick brand guidelines
18. Cargill Identity Style Guide
    
19. Cambridge University Brand Guidelines
    
    
20. Cunard Brand Guidelines
21. ELMER 2– User Interface Guidelines for Government Web Forms (PDF, 1.2 mb)
22. Easy Group Brand Manual (PDF, 2 mb)
23. Eclipse User Interface Guidelines
24. Federal Identity Program (Canada)
25. Google material design
    
26. GOOD Technology Brand Identity Guide
27. Gnome Human Interface Guidelines
28. Heineken Visual Guidelines
29. Java Look and Feel Design Guidelines
    
30. KDE User Interface Guidelines
31. Kew’s Brand Guidelines (PDF, 5 mb)
32. Microsoft Inductive User Interface Guidelines
33. Microsoft Surface User Experience Guidelines
34. MITRE- Guidelines for designing user interface software
35. NASA style guide
36. Novozymes’ brand guide (private access)
37. The New School Visual Identity Manual (PDF, 6.5 mb)
38. The New School Web Style Guide
39. Oracle Alta Mobile UI Guidelines 
40. Oracle Alta UI Guidelines
41. Oracle Fusion Help User Interface Guidelines
42. Oracle Applications User Interface Standards for Forms (PDF)
43. Oracle Browser Look and Feel (BLAF) Guidelines
44. Oracle Fusion Applications User Experience Patterns and Guidelines
45. Oracle Rich Client User Interface (RCUI) Guidelines
46. Palm OS User Interface Guidelines
47. RSA Brand Guide
48. Salesforce lightning design system
49. SAP Design Guidelines and Resources
    
50. Silicon Graphics Indigo Magic User Interface Guidelines
51. Skype Brand Identity Guidelines
52. Spelman College Visual Identity Guidelines (PDF, 1.3 mb)
53. Reuters Brand Center
54. Taligent Human Interface Guidelines
    
    
55. Uber design guidelines
56. University of Northern Colorado Identity Style Guide (PDF, 2.3 mb)
57. WebEx brand style guide
58. Windows User Experience
59. Windows User Experience Guidelines
60. Windows User Experience Interaction Guidelines
61. Windows XP Visual Guidelines (There’s a download section to the right to download WindowsXP DesignGuidelines)
62. Yale Web Style Guide
    
    
63. Yale’s Visual Identity