1. Particle

   indicates the subject of a sentence

   「あの音で考え事ができないわ」と、彼女はタイプライターを見つめながら言った。

2. indicates possession

   literary in modern Japanese; usu. written as ヶ in place names

3. Conjunction, Particle

   but; however; (and) yet; though; although; while

4. Particle

   and

5. used after an introductory remark or explanation

6. regardless of ...; whether ... (or not); no matter ...

   after the volitional or -まい form of a verb

7. indicates a desire or hope

8. softens a statement

   at sentence end

9. indicates doubt

   at sentence end

10. indicates scorn

    after a noun at the end of an interjection

Also written ヶ、ケke