There are many different kinds or row counters, in a wide range of prices and styles. My only caution is if you get one, get one that will slip on a wide range of needle sizes.
Recent FOs: Earrings; Celtic Cap & Scarf-y; Swatches for TWP; 6 EarFlap Hats; Hand-painted-yarn Sun Spot Stole that decided it wanted to be a Vintage Velvet Scarf; DD's Fuzzy Socks; Shadow Pillow; Aran Pillow; DS's Thuja Socks; Tree of Life Square; Sunny-Flower Square; Ornament; Extreme Knitting 2-in-1 Socks; Single-Needle Scarf Trio; DS's Cardigan; Qiviut Lace Scarf; DD's Daria Belt; DD's Fun Scarf; Mini-Purse from first yarn I spun; BECKA'S LEAVES OF WHIMSY SOCKS W/SWAP YARN FROM BECKA!!!; Knit Bead Bracelet & Earrings; Happy Socks; "Really Cool Socks"; Eagle's Flight Socks; Cabled Fingerless Mitts; Mistake-Rib Socks; Bamboo Mini-Bag; Felted Vase; DD's Basket; Felted Clogs; DS's Sweater; DD's Lacy Stole; Oversize Booga; Crazy Quilt; DS's Backpack.
On needles: A Special Secret Present; Never-Ending Afghan (remainders/reminders from all my projects).