These are resources, not necessarily recommendations (though for some tools I've written a glowing review). Some are free and others are free to try then require purchase. Please check them out and decide for yourself if they will work in your classroom.
Boomwriter: introducing various writing strategies and offers students space to practice their writing while incorporating those new techniques
Allsides - looking at news sources and telling you whether they are L,C or R and offering another POV on the same topic for a different source