Lightweight plugin with great support

For a free plugin, UsersWP has a good range of features. Nice front end UI with overlays for login / reg forms. Plays well with the other AyeCode tools on my site (GeoDirecory and GetPaid). And support is very good – even coming back proactively to fix an error a week or so after I had given up hope that it was even fixable. Good product, good team.