if !exists("g:WindowBufManager")
  let g:WindowBufManager= {}
endif

function! StoreBufTab()
  if !has_key(g:WindowBufManager, tabpagenr())
    let  g:WindowBufManager[tabpagenr()] = []
  endif

  " add the new buffer to our explorer
  if index(g:WindowBufManager[tabpagenr()], bufname("%")) == -1 && bufname("%") != ""
    call add (g:WindowBufManager[tabpagenr()],bufname("%"))
  endif
endfunction

function! WindowBufManagerNext()
  " find the next index of the buffer
  let s = index(g:WindowBufManager[tabpagenr()], bufname("%"))
  if (s!= -1)
    let s = (s +1) % len(g:WindowBufManager[tabpagenr()])
    execute 'b ' . g:WindowBufManager[tabpagenr()][s]
  endif
endfunction

augroup WindowBufManagerGroup
  autocmd! BufEnter * call StoreBufTab()
augroup END

:call WindowBufManagerNext()

$ vim file1 file2
:tabnew
:argl file3 file4 file5
:n
:n
gt
:n
gt
:N
and so on…