+
+### 3. Hasu
+This is my favorite keymap with HHKB Fn, Vi cursor and Mousekey layer. See [keymap_hasu.c](keymap_hasu.c) for detail.
+
+
+### 4. SpaceFN
+This layout proposed by spiceBar uses space bar to change layer with using Dual role key technique. See [keymap_spacefn.c](keymap_spacefn.c) and [SpaceFN discussion](http://geekhack.org/index.php?topic=51069.0).
+
+#### 4.0 Default layer
+ ,-----------------------------------------------------------.
+ |Esc| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|Backsp |
+ |-----------------------------------------------------------|
+ |Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| \|
+ |-----------------------------------------------------------|
+ |Caps | A| S| D| F| G| H| J| K| L| ;| '|Return |
+ |-----------------------------------------------------------|
+ |Shift | Z| X| C| V| B| N| M| ,| .| /|Shift |
+ |-----------------------------------------------------------|
+ |Ctrl|Gui |Alt | Space/Fn |Alt |Gui |App |Ctrl|
+ `-----------------------------------------------------------'
+#### 4.1 SpaceFN layer