When looking at freebies one needs to consider it's usefulness. :)
You see, one of the most important lessons I needed to learn when looking at freebies is this: they are NOT all created equal. They really aren't.
Why is that?
1. Some are just samplers, trying to get you to buy something that may or may not have significantly more value.
2. Some are for an age level higher or lower than your children are at, so unless it is something special no point in getting it.
3. Some are things you can honestly buy in a book and not have to print off for CHEAPER then printing off a few "free" samplers.
4. Some freebies simply aren't worth the page they are offered on (granted, my opinion, but some things are so basic why are they being offered?)
Now there are some freebies out there that are good, and even better than that, are offered by people that are consistently good. These can be things like free lesson plans for learning things, or actual free PDF's for teaching, and so forth.
Here are a few of the bloggers that I enjoy for their materials.
HIghhill Homeschool. Good experiments and practical know-how here.
Practical pages. I go here mostly for art ideas.
I got introduced to Write Bonnie Rose through a book called Asia, it's people and History. And an gradually becoming a fan. She's is not shy about sharing resources or opportunities. :)
Boyschooling. Homeschooling boys... it takes a certain skill set. :)
3dinosaurs frequently puts together good stuff.
Homeschool Share has put things together more than once that I have found useful.
That's all I have time for now, I'll add more things later as I can. :)