| Label | Sifflet.UI.LittleGtk, Sifflet.UI |
| labelNew | Sifflet.UI.LittleGtk, Sifflet.UI |
| labelSetText | Sifflet.UI.LittleGtk, Sifflet.UI |
| LastCursor | Sifflet.UI.LittleGtk, Sifflet.UI |
| Layout | Sifflet.UI.LittleGtk, Sifflet.UI |
| layoutGetDrawWindow | Sifflet.UI.LittleGtk, Sifflet.UI |
| LayoutGraph | Sifflet.Data.TreeGraph |
| layoutNew | Sifflet.UI.LittleGtk, Sifflet.UI |
| LayoutNode |
| 1 (Type/Class) | Sifflet.Data.TreeLayout |
| 2 (Data Constructor) | Sifflet.Data.TreeLayout |
| layoutNodeSource | Sifflet.Data.TreeLayout |
| layoutPut | Sifflet.UI.LittleGtk, Sifflet.UI |
| layoutRootBB | Sifflet.Data.TreeLayout |
| layoutSetSize | Sifflet.UI.LittleGtk, Sifflet.UI |
| layoutTreeBB | Sifflet.Data.TreeLayout |
| layoutTreeMoveCenterTo | Sifflet.Data.TreeLayout |
| leaf | Sifflet.Data.Tree |
| LeaveNotifyMask | Sifflet.UI.LittleGtk, Sifflet.UI |
| Leftbutton | Sifflet.UI.LittleGtk, Sifflet.UI |
| LeftPtr | Sifflet.UI.LittleGtk, Sifflet.UI |
| LeftSide | Sifflet.UI.LittleGtk, Sifflet.UI |
| LeftTee | Sifflet.UI.LittleGtk, Sifflet.UI |
| levelOrder | Sifflet.UI.Frame, Sifflet.UI |
| lightBlue | Sifflet.Data.TreeLayout |
| lightBlueGreen | Sifflet.Data.TreeLayout |
| lightGray | Sifflet.Data.TreeLayout |
| lineWidth | Sifflet.Data.TreeLayout |
| list | Sifflet.Language.Parser |
| listStoreNew | Sifflet.UI.LittleGtk, Sifflet.UI |
| literal | Sifflet.Language.Parser |
| llab | Sifflet.Data.WGraph |
| LlAngle | Sifflet.UI.LittleGtk, Sifflet.UI |
| LrAngle | Sifflet.UI.LittleGtk, Sifflet.UI |
| ltZero | Sifflet.Data.Number |
