zoomwintab.vim is a simple zoom window plugin that uses vim's tabs feature to zoom into a window inspired by ZoomWin plugin
Press <C-w>o or <C-w><C-o> to zoom in current window or use ZoomWinTabIn command
Press <C-w>o or <C-w><C-o> again to zoom out current window or use ZoomWinTabOut command
You can toggle between zoom in and out using ZoomWinTabToggle command