If we're strictly talking about gear...
(Some of this is repeated from above, so just consider it my two cents)
Plastic restraints, the zip-tie ones.
Tranq Patches. You can NEVER have enough of those for quiet takedowns. With Sleight of Hand, you can even get a handshake and take someone down with it.
Licensees. Every little thing you can authorize a SIN to do can come in handy. We had a SIN that had authorization and papers for real estate that not only saved us a bad fight, but ended up turning us a big profit.
Gifts for contacts, if you bother with role-playing contact maintenance.
Stock. You can buy into corps and potentially play the market for spare nuyen, but on top of that, you get access to meetings inside the corp for some insight. Year of the Comet taught me that trick, and it's a good one to give circumstantial bonuses for Corporate Rumors, Politics, and get those Right Place, Right Time and Moving the Story Along karma.
Glue sprayer. I have never had any piece of gear so useful as a glue sprayer. You can tie hands together, fasten a bandage quickly, reinforce a door... It's ALMOST better than duct tape.
More ammo. Always more ammo. And grenades. They are cheap, and a flash bang doesn't always need to be thrown accurately so much as dropped at the right place or time (down stairs, elevator shaft, just on the floor as you run to hit the people chasing.)
Sensors. You can get a lot of sensor packages cheap, and there's no reason you can't set them up remotely to provide a little extra security or surveillance when you need it.
Disguises. And keep in mind a good mage with the Fashion spell and Disguise can refit damn near anything into anything else of equal mass. But if you don't have that, keep a few easy outfits. Any good runner can look like a street tough, a suit, a norm, a club kid and a hobo, at the very least.
Anything you can one-time-purchase to make a safehouse a little more comfortable, useful, or safe (in ascending order of importance).
A spare anything. Extra gun. Extra flak jacket. Spare bug drone.
Anyway, just my initial thoughts.
