A free Hebrew-language site explaining grammar, etymology and word history.
Details
Long-running independent site with hundreds of short articles on binyanim, plurals, common mistakes, loanwords, biblical versus modern usage and the origins of everyday words. It is the resource to browse when you want to understand why Hebrew works the way it does rather than just drill it. Written entirely in Hebrew and organised as an archive rather than a course, so it rewards curiosity more than it supports structured study.