There's 7 for Canon and 7 for Legends.
Or well ok, yeah there's more than 10 for Legends if you're trying to speak more than just the traditional 7.
There's the 7 of the old Jedi Order, 3 for the NJO.
There's also mounted lightsaber combat, TK saber combat, Lightsaber Pike combat, Lightwhip combat, hybrid lightsaber forms.
There's also Lightsaber forms of the Imperial Knights
The Jedi Knight/Dark Forces games introduced a lot of stuff, like Form "Zero" and Trispzest (which is lightsaber use while flying). And I guess, Jar Kai, if you want to count it.
The Labyrinth of Evil novel mentioned something called "Lus-ma" which is the technique that Grevious was trained in by Dooku. We don't know anything about it except that it exists.
Besides that, Zenwolf's list is pretty good!