You can read about the Link List feature at this FAQ, including the number of links allowed according to account type. This feature is supported by all layouts:
- 3 Column
- A Novel Conundrum
- A Sturdy Gesture
- Bloggish/The Style Contest
- Classic
- Clean and Simple
- Component (Available to EA, Plus, Paid, and Permanent accounts)
- Cuteness Attack
- Dear Diary...
- Digital Multiplex (OSWD)
- Disjointed
- Expressive/Expressive Winter/Mixit (Available to EA, Plus, Paid, and Permanent accounts)
- Flexible Squares
- Generator
- Gradient Strip
- Haven
- Magazine
- Minimalism
- Nebula
- Notepad
- Opal (Libra OSWD)
- Punquin Elegant
- Quite Lickable
- Refried Paper
- Smooth Sailing
- Tabular Indent
- The Boxer (Available to EA, Paid, and Permanent accounts)
- Tranquility II
- Unearthed
- Variable Flow