HWT definitely sells home versions. It's one of the more popular handwriting curricula used among homeschoolers. They also have a free app for practicing letter formation using their wet-dry-try technique. They also sell keyboarding programs, and bundled handwriting/keyboarding packages. You'd probably want to try the grade 2 program, as that is the last grade that works primarily on manuscript. (FWIW, they even have workbooks in Spanish, French, and Hebrew.)
For math AT/speech-to-math, look at EquatIO (chrome extension) and MathTalk (Dragon product for math), among others.
