SC2ALLin1 11.2.11 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. The SC2ALLin1 installer is commonly called SC2ALLin1.exe. This free tool was originally created by Vernam7. SC2ALLin1 is included in Games. The most popular versions among the program users are 11.2 and 11.0.
From the developer:
SC2ALLin1 is an automated legit launcher tool that makes it possible for you to play the StarCraft 2 retail offline, without cd-keys etc, load skirmish battles, and watch replays.
You may want to check out more software, such as GW Team Builder, Abfluege Online or ZHLT Final, which might be similar to SC2ALLin1.