Kayako is one of the best. We have been using it for a while now and I can't complain. Its a great product. It will cost you; however, prior to this we used Livezilla which also worked good for us, but we wanted a all in one deal to connect support, sales and live chat.
After a disappointing trial with Zopim, I'm currently testing JivoSite. It's a free solution (for up to 5 agents) and so far it's doing what it says on the tin.
Just started to use that chat software. Not to bad minus a few dis- connect every now and then. I was thinking about WHMCS chat addon however since my billing area is located on a different server then my web hosting site I decided against it.
why have your billing area on a diff server to your main site. the best option is to place your main site and billing area on a server together and then all your hosting sites/clients on a different server.
I just piad $1K for Kayako and its probably the best investment made since got back into this this time. If just need LHelp by all means use afree chat software, but if want tickets with escalations, voip voice, geodata, built in remote desktop, live help, knowledgebase, andtroubleshooter then kayako is the only semi-affordable solution on the market. I looked and researched them all it seemd for weeks before shelling out 1K for it.
Valero is good one it has a nice user friendly feel to it
I tried Livezilla and didn't really liek it much. I use jivosite and so far it's great.