This page is incomplete! You can contribute information using GitHub issues or pull requests.
H2V Guerilla, part of the H2V-EK, is a visual tag editor. Although it can visualize bitmaps and play sounds, it is primarily focused on editing and viewing the structured fields which comprise tags. It does not offer ingame previews or interactive placement of objects, which is Sapien's role.
Using File > Save/Load Workspace, you can save and reload a file which contains the current state of open tags and their window positions.