https://bitcointalksearch.org/topic/ann-opal-pos-secure-messaging-no-ico-bitsquareio-cryptopia-yobit-778720
Severely undervalued at present
Otherwise you should also look at XBoT, PMP and KTK.
All heavily undervalued with interesting features:
XBoT: Twitter trading bot, currently same development ongoing for Weibo (longer registration process for developers).
KTK: one of the first fully freely distributed coins with marketplace about to go live.
PMP: one of the recent freely distributed coins with long six month distribution process, rare.
OPAL: html5 wallet plus marketplace plus some more features, see the link already provided.