Need help identifying a few organisms

[ptolatar]

I recently had a chance to observe and photograph some microorganisms with my scope. Out of all the organisms I have observed, I had trouble identifying the following three:

http://i.imgur.com/D4W34Q0.jpg (27x stack)

http://i.imgur.com/JAaR4Eo.jpg (7x stack)

http://i.imgur.com/vaVjCey.jpg (13x stack)
http://i.imgur.com/wOqxVNv.jpg (12x stack)

So I was hoping I could get some help. All of the photos provided were taken with a 40x obj. Unfortunately, I can't provide an accurate scale as I don't yet have a stage micrometre. The microorganisms were sourced from moss soaked in water for about 5 hours.
And don't mind the uneven white balance, I screwed up the settings without realising at the time .

[zzffnn]

Insect scale

Probably fungal spore, not sure

Ameoba test
Ameoba test

[ptolatar]

Thanks for the ID zzffnn