Another Dice rolling app.  This one give you a more 3D feel to the dice roll.

This is a tool that can let you organize you game narrative, especially if you want to give your student player agency in a choose your own adventure game. This could be a big time saver in addition to helping you visualize your game/unit fusion.

As you may know Minecraft, is an open sandbox virtual world that educators have used for a number of purposes from the foder for simple math problem to advanced urban planning. This link takes you, an interested educator, to;

"Minecraft: Education Edition Teacher Academy is a series of three sections and eleven courses which focus on the use of Minecraft: Education Edition as a teaching and learning tool designed to support strong pedagogical practices in the learning environment. The courses are divided into three sections of topics intended for beginner, intermediate, and advanced users. At the end of this Learning Path, you will become a Minecraft Certified Teacher and receive the badge." 

If you want to design a board game that has traditional physical pieces, mats, components, and even the box itself, this company seems ready to make such an idea areality.  I have not used them myself, but it looked too good not to pass on.

If you need to roll variety of dice (d4, d6, d8, d10, d12, d20, and/or d100)  this is avery easy to use app.  It also records the roll result so you can click the roll button quickly and then go back to see what you rolled if you moved on too quickly.

If your classroom game uses a collectoble card or deck developement mechanic this link is for you. I played Magic, the Gathering in grad school. This site allows you to make custom cards for this game, but the cards are gorgeous and should be easily adapted to most card game concepts you may have.

A wonderful collection of word games, randomizers, match games, timelines, badge trackers, and more. All integratable to your Google spread sheets. A perfect place to start if you are looking for premade game mechanics.

This is a map generator that allows you to make some really nice maps for your game.  A paid version gives you access to a greater number of map styles.

International teachers who want to play online with friends and family from around the world might be interested in this. This is a great way to learn board game mechanics while having fun. *Please note there is a free and "Premium" option.