Tapas - Tapas – Comic, Novel and Stories is free to use digital comic application by Tapas Media that puts tens of thousands of comics and web novel on your mobile device.
Izneo - Izneo, Read Manga, Comics and BD is a leading all-in-one digital manga and comic application that allows you to read unlimited comics even offline.
GlobalComix - Professional Comics Publishing
VIZ Manga - VIZ Manga is a multi-platform app that serves as an excellent resource for fulfilling the needs of comic lovers.
Comixology Unlimited - Netflix for comics and graphics novels by Amazon
Manga Storm CBR - Manga Storm CBR is the best-in-class app for accessing and reading DRM-Free comics in formats like PDF/CBR/CBZ on the iPad/iPhone.