Ultracopier vs Teracopy
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Ultracopier and Teracopy is tool to do files copy/move. Teracopy is only under Windows. Ultracopier have plugins, skins, default action for colisions/errors, management for the copy list, accessible debug repport, multiple copy engine, forum, dedicated web site, activity there as - de 6 months.
[edit] Open software vs proprietary software
Teracopy have simple version as free and more evolved as no free, it have too very bug commercial aspect. Ultracopier is GPL3 and totally free and open source.
[edit] Multiple version
The portable version for Teracopy (2.2) is outdated (2.0). Ultracopier have multiple OS version. For windows have 32Bits, 64Bits version, portable version, debug version (with log too see internal info). And their versions are generated by the same source code.