Zcash was lately the hottest coin from the new ones. Is the system good or not - thats another thing - but what it did was bringing attention of people into anonimity of transactions.
Something that BTC misses initially and Zcash was supossed to be the cure. It went trough all medias and made more and more people aware of the tracking transactions problem.
I was predicting that after the ZEC price bull run stops (was traded at even 3000+ BTC per coin - now costs 0.15BTC) the other cryptos resolving this problem will also gain momentum.
Some of them already pumped in price, some will in future and some may never pump. With every investment theres a risk. Anyways here is a list of few interesting ones and short description.
XMR - use to trade at 0.02 had a spike down to way below 0.01 and now has a comeback. Has even its own market pair on Poloniex.
DASH - first coin with masternodes which has option of coin mixing. You can mine it on the famous x11 algo wth GPUs. Trades almost everywhere.
ZCL - Zcash but without huge devs 20% fees. Same algo, same code but with more fair start. Trades Bittrex.
EXCL - clone of DASH but with a twist - 100% Proof Of Stake. You can only stake it by having wallet open or by running masternodes. Trades Bittrex.
BBR - Cryptonote, an unusual algo which works little bit different than usual coins. Wallets also look different than usual ones. Trades Poloniex.
SYS - coin is not anonymous but has a decentralized marketplace and added support for Zcash right now. Trades Poloniex and Bittrex.