What is MAXS?
MAXS allows you to control your Android device and receive notifications over XMPP. You can for example write SMS on your desktop/laptop by sending a command over XMPP to MAXS running on your smartphone.
MAXS is dedicated to users privacy and choice, that is why it's designed modular. This means that the functionality is split across components, which are standard Android applications. These components can be categorized in three types: Modules, Transports and the main component. Modules provide the notifications and commands, which are exchanged between MAXS and the user over so called transports. MAXS modules and transports are glued together with the so called MAXS main application.
Comments and Reviews
Said about MAXS as an alternative
MAXS has decent privacy and simple to setup - even though it's immature. GTalkSMS doesn't appear to have active development