Anti Mosquito Software
Full user review
"Biggest joke on cnet."
Takes very little ram, but still not worth it.
I put them below since there is too much to contain in 250 characters.
1. It has zero effect on mosquitoes. Period. (http://en.wikipedia.org/wiki/Insect_repellent)
2. It is ineffective against pests.
3. It may not work depending on your hardware. It claims to give out ultrasounds between 16000-20000 Hz which is beyond the maximum frequency of a lot of speakers.