I’ll offer a few because I’m a tackle junkie.
Strikemaster 40v auger. Gamechanger. Second best piece of fishing equipment I own after the Minn Kota Ultrex.
Striker Predator suits. Best articles of clothing I own, especially after they’ve been washed a dozen times and soften up.
Lithium batteries on a graph. I’ve only tried the Energized Outdoors version. The battery life is great but I like how light they are. It feels like you forgot the battery at home.
TUCR Commanders. Try a long one. ‘Nuff said. If you don’t like it, it’ll sell in a day on here.
Humminbird Helix Ice 7 G2. I’ve only been using it a half season and am still learning new ways to tweak it, but wow this thing is great.
LED rechargeable headlamps with a dim red light. I’m convinced it doesn’t scare the fish like the bright white light does at night. Great hunting tool, too.
Cold Snap Toothpick Hook Remover. Every panfish angler should own one.
Clam Dave Genz Drop-Kick jigs. Best jig for rigging plastics. The flat surface is picked up really well by a graph so the sensitivity can be turned down.
Another outside-the-box mention is the Snowline Chainsen Pro Crampons. They’re a half-priced version of the Kahtoola Microspikes that can be had for $30-35 on sale. Exact same product. You can actually run on glare ice. Tip-up anglers can appreciate this.