TortoiseSVN は自由です。お金を払う必要はありませんし、どんな用途にも使用できます。GNU General Public License (GPL) のもと開発されています。

TortoiseSVN is an Open Source project. That means you have full read access to the source code of this program. You can browse it on this link http://code.google.com/p/tortoisesvn/source/browse/. You will be prompted to enter username and password. The username is guest, and the password must be left blank. The most recent version (where we're currently working) is located under /trunk/, and the released versions are located under /tags/.