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.
This is the sound of hitting an office chair with the belt, including several strikes recorded from different angles. Some are very light with a high end smack and other are deep and boomy depending on the place of the microphone. Recorded with a zoom h4.
Hitting various detergent plastic bottles and caps on a table and with my finger (pops, plops, blops. . . :)recorded with an xperia phone. Sounds are trimmed, dry with no effects, ready for any sampler.