I am waiting for a stable light version of Windows wallet.Is there any plan to make it available?There is no point in downloading a big sized wallet for a small investors like me

yes this is in the plans. we are evaluating this procedure. Probably electrum based wallet. Zcash and btc are quite similiar so i see no problem. Hopefully it can be accomplished with few modifications. And apart from this we are working on the smartphone/tablet support.