I've used WeepCraft before and found it to be pretty good. http://weepforums.com Although, I'm not sure it's compatible with 1.8
I use Metro. I don't pvp so I just use it for the optifine. ;3 It does have a 1.8 version. I used it too!
Modified clients are pretty overrated on Minetime, unless you PvP. If I'm not using the default client, I'm using am0d, WeepCraft or Energy (There's ups and downs of all but I like WeepCraft most, mainly for the in-built shoutbox.)
It honestly depends on what you're going to use the client for. I recommend if you're pvping to go along with Amod or Energy (both hack clients were made by the same person, they're pretty much the same client, just with a different name) but if you need a hack client for optifine purposes, or mining, Metro is the one to go with.
I don't use clients, but you can easily search up some on the internet using the words "Minecraft Hacked Clients" or something like that.
What do you want the client for? For pvpfest the two best are Flare and Haze. Flare for fast fly and good killaura, Haze for really good killaura and ok fly. OP pvp best are Haze, A-M0d and Latemod 2. Infection i'd say Liquid $moke, Energy or Latemod 2. Skyblock any client that you like. Skywars, i peronally like Exeter the most. Survival Games Haze, Exeter, Liquid $moke or even the new updated Metro or fake Xenon both released on Wizardhax recently, they are basically the same client. All the clients listed above can be gotten for free. Either from Leakforums or if you tell me one you want i can put the links for them in this thread or threw PM.
I use Resilience, which is mainly for PVP purposes, but has a few survival features you could use. There is no 1.8 version out yet, but here is a link to it's download: http://www.wizardhax.com/2014/08/16/minecraft-1-7-2-1-7-10-hacked-client-resilience-download/