Vladimir Nagrebetskiy has released an amazing sample pack with glitch sounds for free.
“You can find useful Glitch & Transitions FX sounds which you can use in all music genres. Also this samples can be used in transitions part and you can use it as loop. All glitch loops has 140BPM. The best genre to use it is Dubstep, Trap, Electro EDM….. The number of unique sounds which this sample pack have is 43. Effects Sounds, SFX, EDM Sounds, Glitch FX, Transitions FX – the Best words which has describe this sample pack!”