Complex sentence: He campaigns for software to be distributed in a manner, such that a user receiving it, likewise receives with it the freedoms to use, study, distribute and modify that software: software that ensures these freedoms (on receipt) is termed free software.
Split into simpler sentences: He campaigns for software to be distributed in a manner such that a user receiving it likewise receives with it the freedoms to use, study, distribute and modify that software. Software that ensures these freedoms (on receipt) is termed free software.