 designed for Rust's
    <code>async</code>/<code>await</code> syntax. Most of its functionality is
    re-exported from other small crates, which you can use directly if you
    don't need all of <code>smol</code>.
  </li>
  <li>
    <a href="https://crates.io/crates/actix">actix</a> -
    A actors framework providing higher-level abstraction for tokio.
  </li>
  <li>
    <a href="https://crates.io/crates/thin_main_loop">thin_main_loop</a> -
    An experimental, cross platform, main loop and futures execut