Update: iSpirit doesn't work very well as a Cydia replacement. Downloading and installing .deb files from the internet is really slow and kind of painful in my opinion. However, installing .deb files that are already downloaded onto your computer is pretty easy.

I am really blown away by how many features iSpirit has; as far as iPhone managers go, this one does everything. It has as many features as iFunbox, Cyder, Plist Editor, and a SFTP client all combined.