Portable Skype 4.0.0.224 & 3.8.0.188 MultiLang

Free internet calls (more infos) without installation.
Download Portable Skype 4.0 on RapidShare (13.3 MB) (md5: 8a117882ec64e854cb1e512e61308a0e)
Download Portable Skype 3.8 on RapidShare (12.2 MB) (md5: e79812518a03fdb0d291185cf22909f7)

Extract (with a PortableApps folder at the device's root) and run SkypePortable.
Settings of installed Skype should be preserved.