Ostinato is a network packet and traffic generator and analyzer with a friendly GUI. It aims to be "Wireshark in Reverse" and thus become complementary to Wireshark. It features custom packet crafting with editing of any field for several protocols: Ethernet, 802.3, LLC SNAP, VLAN (with Q-in-Q), ARP, IPv4, IPv6, IP-in-IP a.k.a IP Tunneling, TCP, UDP, ICMPv4, ICMPv6, IGMP, MLD, HTTP, SIP, RTSP, NNTP, etc. It is useful for both functional and performance testing.
pcapfix is a repair tool for corrupted pcap files. It checks for an intact pcap global header and repairs it if there are any corrupted bytes. If one is not present, one is created and added to the beginning of the file. It then tries to find pcap packet headers, and checks and repairs them.