If you absolutely cannot afford Nexus, here are three legal, free (or cheap) plugins that deliver similar "ROMpler" vibes:

: Introduced a more photo-realistic look with a default "white" skin.

: It is known for a "plug-and-play" workflow where users select a sound and apply basic tweaks rather than complex sound design. Current Status Nexus 2 has been succeeded by newer versions, including Nexus 3, 4, and 5