tone is a cross platform audio tagger and metadata editor to dump and modify metadata for a wide variety of formats, including mp3, m4b, flac and more.
nomacs is a free, open source image viewer, which supports multiple platforms. You can use it for viewing all common image formats including RAW and psd images.
TagScanner is a powerful tool for organizing and managing your music collection. It can edit tags of most modern audio formats, supports ID3v1/v2, Vorbis comments, APEv2, WMA and MP4(iTunes) tags.
KillDisk Ultimate is an easy-to use tool set that allows to sanitize storage media using 24 international erase methods including US DoD 5220.22 M and NIST 800-88.