Free Trap and Dubstep Samples No 7 is a free sample pack. 60 free samples: Bass One-Shots, Bassdrums, Basslines, Hihats, Leads, Snares, Claps and also some Vocals. They are of course royalty free as usual and have an unpacked size of 50.6MB. The tempo is 140bpm, all files are 24bit wavs.
The Synsonic BD-909 is a free plugin model of the TR-909 Bass Drum. There are also more sound shaping possibilities like distortion, noise decay, tune depth and hold and pitch.
The free Synsonic Instruments BD-808 Software-Plugin is useful for creating 808-style Bass Drum Sounds for Windows and macOSX. The underlying signal processing is based on a detailed analysis of the original 808 Bass Drum circuit.
EKD is a free Electronic Kick Drum VST Instrument Plugin.
Bigroomkixsynth is a free VSTi specifically created for making Kick Drums and Bass Drums. It uses no samples only 100% synthesis to achieve a thick meaty UMPH to your track with ultimate control to the sound.