I've seen
Avira block loads of bad sites and it does have more FPs than other addons, but that's on us to decide. It's better (atleast for me) to decide rather than have no alert on potential malicious/bad links. It does have good rogueware and adware sites blocking (that feel like FPs at times to users). But that's great!
I have used
Avast IS and its blocking is quite decent, probably lesser than Avira.
Norton Safe Web and
MCAfee URL Advisor have been there for very long and these cover big domain areas of the Internet. I have used both, a few years back, but cannot comment on their effectiveness now, against the others. Norton has good community ratings and badware/rogueware aite ratings.
Regarding
BD TrafficLight, I'll totally agree with Evjl Rain. It is great at blocking phishing attempts, but not much good otherwise.
I haven't tested
Panda Safe Web, though some reviews put it along the famous ones.
@Xsjx please add Norton Safe Web in the poll options.
Those do warn atleast
You've asked about 'Web reputation plugin and site advisor, not URL blocker. So I'm considering things in that spirit. Atleast their effectiveness will be known to people here.
Can you guys comment on
Adguard's malware and phishing link blocking abilities as compared to Avira or the likes (and ignoring the complementary URL blocking ability of the Realtime AV on the system)?
You've already appreciated its malware filter, but it would be nice to know how well it stands against the others (experiences will do)