With eLabFTW a free open source software is available, which can replace laboratory books in paper form by an electronic laboratory book. Due to the AGPL license it is freely modifiable and highly customizable to your own needs. It runs on all common operating systems and can be accessed locally as well as mobile.
eLabFTW is powered by PHP/MySQL in Docker containers and it is recommended to install it on a server to be able to use it e.g. institute-wide. However, it is possible to install it on a private computer or simply as an online solution of the TU Graz.
There is also an online live demo offered to get an overview of the functions.