KVR: Virtual Instruments, Virtual Effects, VST Plugins, Audio Units (AU), DirectX (DX), Universal Binary Compatibility - Audio Plugin News, Reviews and Community
Use the search on the site to narrow down your choices for vst, and be sure to check off only Mac versions. For wobble stuff, you'll be wanting to look into filters... specifically filters with LFO controls.
Everything else you could want is searchable there too.