The license for SourceTree says:
'Validly licensed' means the following:
(i) For evaluation, using the software for up to 30 days free of charge, or
(ii) After purchasing a single license, using the software on a single computer,
So if it's really free, why not say so in the license? When trying to convince my boss that SourceTree is the git client we should use, the license doesn't help my case.