I generated a "chirp" with audacity going from something like 400 to 0, logarithmically. Then i faded it in and out. Useful for video games, especially old ones, for running into a wall or something like that.
A quick multisample snare hit i did with pro tools 10. I didn't add any reverb so y'all could choose one that fits your project, but it's full and punchy. Sum to mono if you don't like the subtle panning i added. Enjoy!.