Vecto began in 2015 as a Rack Extension for Propellerhead’s Reason, a vector synth created by Dutch sound designer Rob Papen. Apparently he then received so many requests to make a version of it that would run outside Reason, he eventually created the recently released VST/AU/AAX plug-in versions.
In classic vector synth fashion, as implemented on many a Sequential and Korg synth over the years, Vecto has four oscillators, each represented by a corner of the square on the red panel in the middle of the software interface (the X/Y controller), and users can fade between these sound sources by tracing a vector path across the square. This process can then be automated or modulated by MIDI controller data, LFOs, or — as on many of the hardware vector synths — hardware controllers such as (most intuitively) joysticks.
Vecto offers a great many audio sources for its four layers, including standard synth oscillator tones and sampled waveforms, and there are also many preset vector paths to draw on (quite literally). To finish off your sounds, the results may be passed through an arpeggiator, two filters with 28 types to choose from, and an effects section. In its current VST/AU/AAX form for Mac and Windows, Vecto costs £80$99, and is available boxed or as a download. Rob Papen's own introductory video for Vecto can be seen below.
Also just released from Rob Papen is RP-Reverse (below), an audio-reversing plug-in that allows users to tempo-sync reversed audio samples in a precise way for creative incorporation in a track. Control over how the reversed audio fades in or out is also possible via the plug-in interface, and automatable in the host DAW, as is a mute function. Like Vecto, RP-Reverse is available stand-alone (for £33.95$39) or as part of the giant Rob Papen eXplorer 5 bundle, which contains 20 plug-ins, including Vecto and RP_Reverse, and retails for £415$499.