abacabBlue Cat Audio has a nice free FX bundle here:http://www.pluginboutique.com/product/2-Effects/39-FX-Bundle/277-Blue-Cat-s-Freeware-Plug-ins-Pack-II-Bundle- The Triple EQ has a preset called "Old Speaker" that is easy to sweep with to get the desired effect. Blue Cat's ChorusBlue Cat's FlangerBlue Cat's FreqAnalystBlue Cat's Gain SuiteBlue Cat's PhaserBlue Cat's Triple EQ
AndertonTH3 has merit too.
chuckebabyI personally like the Vocal plug in that comes with Sonar (Vocal strip).there is a preset in there for a few different flavors. telephone, old radio, exc.With a little bit of saturation you can get a doable lo-fi sound.