The best Software Installer alternative to Cydia is TweakBox, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Cydia and five of them are Software Installers so hopefully you can find a suitable replacement. Other interesting Software Installer alternatives to Cydia are Cyder, Installer, LBox and IPackager.
TweakBox App is a method to get in paid purchases from the App Store for free, to test before buying.
Its the most reliable out of them all, it always works and its massive commmunity is always very nice and friendly
Cyder is a lightweight application that allows you to download Cydia packages for your jailbroken iPhone from your desktop computer. Downloaded packages may then be moved onto your iPhone straight from Cyder, or manually through OpenSSH or an iPhone file manager (e.g. i-Funbox).
Installer is a package manager build specifically for iOS.
Older versions of Installer are Open Source.
A native iOS repository manager and downloader offering seamless integration with LiveContainer. Browse public sources, download IPAs, and install/launch apps directly on your device.
IPackager is an app for non-jailbroken devices and installs many Cydia tweaks without the need of a jailbreak. This app is in testing/development and not finished, but it can be used and updates inside the app.
Belarus
Tweakbox automatically updates so you don’t have to download a new app every update. Also, it doesn’t require a jailboken device.