Shoelaces seem to be designed to come untied. It is annoying and unsafe to have to keep stopping and retying your shoes. These gizmos and systems help keep your shoelaces tied. They come in a few varieties: Tacky stick to make your existing laces less likely to untie, lace locks you place on or over your existing laces, and lacing systems to replace your current shoelaces.
This is a good option to try for all of your laces - dress shoes as well as athletic shoes. This stick puts a safe, slightly tacky coating on your laces so they won't come untied easily. The advantage is that it is invisible and doesn't add any time to tying and untying your shoes. It lasts for weeks and is very inexpensive.
A complete system of laces and lock. The instructional video is amusing with a tongue-in-cheek nod to "space age technology to keep your shoes tied."
These elastic laces have collapsible knots that allow you to achieve a custom fit between each eyelet.
An elastic shoelace and locking system that features elastic laces combined with a spring activated locking device.
This plastic lace lock gizmo uses your existing laces. Thread them through it and lock them into place. To untie your shoes, simply unlock and loosen. It also makes it easy to tighten or loosen your laces. Stays on your laces so you don't lose it.
A little elastic and plastic gizmo to hold your laces in place, available in colors.
Another elastic lace and lock system, comes in a big variety of colors.