This document discusses different network steganography techniques, including tools developed to implement them. It describes using packet delay modification (Timeshifter) and packet content modification (Stegnet and BitStegNet) to covertly transmit messages. Timeshifter modifies ICMP packet delays. Stegnet modifies ICMP packet data fields. BitStegNet modifies the timestamps in μTP packet headers used by BitTorrent. The document outlines the goals, techniques tested, accomplishments and limitations of each tool, concluding future work could include testing in open networks and improving usability.