Lifebar - i3wm transparent workspace status and tool bar for Linux
The file lifebarrc.example is well annotated and contains all the available configuration options. Configuration files should be saved/linked to ~/.lifebarrc to be read by lifebar. An alternative lifebarrc example is provided in lifebarrc.example-highres that is more suitable for high-resolution monitors (3K+).
Transparency - all colour settings allow for full RGBA colour selection, including the main background area.
All the major components you expect from a workspace bar are included, such as network interface monitoring, filesystem capacity, battery charge etc.
Highly configurable layout, with single-pixel nudge for positioning items precisely.
Mousewheel over the clock allows you to set and alter an alarm timout in 5 minute increments, useful for pizzas and such.