GridSelect displays items(e.g. the opened windows) in a 2D grid and lets the user select from it with the cursor/hjkl keys or the mouse.

You can use this module with the following in your ~/.xmonad/xmonad.hs:

   import XMonad.Actions.GridSelect

Then add a keybinding, e.g.

   , ((modm, xK_g), goToSelected def)

This module also supports displaying arbitrary information in a grid and letting the user select from it. E.g. to spawn an application from a given list, you can use the following:

  , ((modm, xK_s), spawnSelected def ["xterm","gmplayer","gvim"])

It is possible to bind a gsconfig at top-level in your configuration. Like so:

-- the top of your config
{-# LANGUAGE NoMonomorphismRestriction #-}
import XMonad
...
gsconfig1 = def { gs_cellheight = 30, gs_cellwidth = 100 }

An example where buildDefaultGSConfig is used instead of def in order to specify a custom colorizer is gsconfig2 (found in XMonad.Actions.GridSelect):

gsconfig2 colorizer = (buildDefaultGSConfig colorizer) { gs_cellheight = 30, gs_cellwidth = 100 }

-- | A green monochrome colorizer based on window class
greenColorizer = colorRangeFromClassName
                     black            -- lowest inactive bg
                     (0x70,0xFF,0x70) -- highest inactive bg
                     black            -- active bg
                     white            -- inactive fg
                     white            -- active fg
  where black = minBound
        white = maxBound

Then you can bind to:

    ,((modm, xK_g), goToSelected  $ gsconfig2 myWinColorizer)
    ,((modm, xK_p), spawnSelected $ spawnSelected defaultColorizer)

You can build you own navigation mode and submodes by combining the exported action ingredients and assembling them using makeXEventhandler and shadowWithKeymap.

myNavigation :: TwoD a (Maybe a)
myNavigation = makeXEventhandler $ shadowWithKeymap navKeyMap navDefaultHandler
 where navKeyMap = M.fromList [
          ((0,xK_Escape), cancel)
         ,((0,xK_Return), select)
         ,((0,xK_slash) , substringSearch myNavigation)
         ,((0,xK_Left)  , move (-1,0)  >> myNavigation)
         ,((0,xK_h)     , move (-1,0)  >> myNavigation)
         ,((0,xK_Right) , move (1,0)   >> myNavigation)
         ,((0,xK_l)     , move (1,0)   >> myNavigation)
         ,((0,xK_Down)  , move (0,1)   >> myNavigation)
         ,((0,xK_j)     , move (0,1)   >> myNavigation)
         ,((0,xK_Up)    , move (0,-1)  >> myNavigation)
         ,((0,xK_y)     , move (-1,-1) >> myNavigation)
         ,((0,xK_i)     , move (1,-1)  >> myNavigation)
         ,((0,xK_n)     , move (-1,1)  >> myNavigation)
         ,((0,xK_m)     , move (1,-1)  >> myNavigation)
         ,((0,xK_space) , setPos (0,0) >> myNavigation)
         ]
       -- The navigation handler ignores unknown key symbols
       navDefaultHandler = const myNavigation

You can then define gsconfig3 which may be used in exactly the same manner as gsconfig1:

gsconfig3 = def
   { gs_cellheight = 30
   , gs_cellwidth = 100
   , gs_navigate = myNavigation
   }

Rearrangers allow for arbitrary post-filter rearranging of the grid elements.

For example, to be able to switch to a new dynamic workspace by typing in its name, you can use the following keybinding action:

import XMonad.Actions.DynamicWorkspaces (addWorkspace)

gridselectWorkspace' def
                         { gs_navigate   = navNSearch
                         , gs_rearranger = searchStringRearrangerGenerator id
                         }
                     addWorkspace

Selecting a workspace:

Selecting a window by title: