In the past we have seen many Cydia alternatives such as Rock, Icy, Installer. None have lasted as long as Cydia, as it prevailed as the main installer for majority of the lifetime of jailbreaking. A new installer iTweakStore hopes to change that. Coming soon it will offer an new place to install and browse tweaks for any jailbroken device. Most likely it will meet its fate within months of release, but nothing for certain. Personally, I liked rock more than Cydia and was mad that it was bought out. For people feeling the same way this might be a new hope. Not much is known now, other than the preview on their webpage.
On their twitter they claim that it will be out within the next couple on months.