Open Office
OpenOffice.org is a multiplatform and multilingual office suite and an open-source project. Compatible with all other major office suites, the product is free to download, use, and distribute.
Spelling City
Here's a simple but useful site that can help students practice
spelling. Teachers (or students and parents) can enter a list of
spelling words and then go into "teaching" mode -- where a human
voice will pronounce and spell a word and use it in a sentence. Or
gain more familiarity with the worlds by playing a couple of simple
games. You can also tap into pre-prepared word lists grouped by grade
level and sorted alphabetically. More word games are promised, and
you can ask questions of the creators and suggest new features
through a discussion forum.