You've probably already seen the trick about using the internal stiffener of a spent disposable foam brush for spreading glue, but here's a way to go it one better.
fine tip glue bottles – The Frugal Crafter Blog
Sili Glue Roller with Sili Glue Tray for Arts Crafts Nepal
The hot dish on hide glue
The Complete Sili Glue Kit includes 2 different size Sili brushes, the Sili Glue Tray and the versatile Sili Glue Comb/Squeegee. All 4 of these items together provide you with all the glue up tools you need to get you going on your next projects. Ideal for woodworkers, arts and crafts, hobbyists and more!.
The Complete Silicone Glue-up Kit
Put the Squeeze on Excess Glue
Allied Brass Vanity Top Tumbler and Toothbrush Holder with Groovy Accents in Satin Nickel 955G-SN - The Home Depot
Smart-Puzzle Glue at Eurographics
Cracking the glue code
Grab-it-and-go glue tote
Products tagged RWO Mightystik Tiller Extension - 3 Sizes - The Wetworks