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