i3-gaps
A fork of the i3 window manager with gaps and some other features
...It is kept up to date with upstream, adding a few additional features such as gaps between windows. In order to use gaps you need to disable window titlebars. This can be done by adding only one command line to your config. Gaps are the namesake feature of i3-gaps and add spacing between windows/containers. Gaps come in two flavors, inner and outer gaps wherein inner gaps are those between two adjacent containers (or a container and an edge) and outer gaps are an additional spacing along the screen edges. Gaps can be configured in your config either globally or per workspace, and can additionally be changed during runtime using commands (e.g., through i3-msg). ...