Altstore - A home for apps that push the boundaries on iOS
iMazing - iMazing lets you transfer music, files, messages, apps and more from any iPhone, iPad, or iPod to a computer, Mac or PC. Manage and backup your iOS device simply without iTunes. (was DiskAid)
Cydia - An alternative app store for jailbroken devices.
i-FunBox - General file management software for iPhone and other Apple products
iOS Haven - A listing of tweaked apps and games for iOS devices. Install directly from the browser.
iExplorer - iExplorer lets you easily transfer music, playlists, text messages, files and more from any iPhone, iPod, or iPad to a Mac or Windows computer and iTunes.