Any Free Trance Vst/Presets/Soundbank for FL Studio ?

its so easy to make these analog type synth patches and drum sounds just with the included VSTis in FL that seeking presets seems silly... as far as the synths go you will want to spend a lot of time automating the filters to sweep in complimentary ways. Some of the stock plugins to play with for this sort of music are Poizone,Toxic Biohazard (both Poizone and TBH are pretty much made to be self-contained trance sequence machines if that's your bag), Sawer (great for detuned leads ala the SC prophet synths), Sytrus (great for FM pads and bells in the DX7 vein of course, but also pretty cool for making more digital sounding sequences), and for your kick just try out the fruity kick generator or load one of the bazillion sampled kicks from the included sample library and fuck with it using the sampler's massive amount of manipulation parameters...

if you are looking for presets to do all the patch-creation work for you then you are missing the point of making electronic music of this type. There's not a lot of room in the idiom for compositional innovation, its all about creating cool synth textures/sequences from scratch and the pacing of when they come in and how they evolve via your manipulation in real time of the filters, envelopes and other parameters like PWM. If you just sequence with a bunch of presets you are essentially making someone else's song since more than half the battle is programming interesting, complimentary synth textures.