ELN is great for:
ELN is quite mature and used daily in our lab. ELN has never caused anyone to lose any data or notes. To the contrary, since most people type faster than they can write by hand, ELN has helped people take more detailed notes than they would otherwise have. One of my postdocs has collected 2,500 pages of notes and graphs within two years of switching to ELN!
ELN is free and open source and is available for Windows, Mac, and Linux:
Development of ELN is ongoing. Your suggestions, bug reports, and code contributions are welcome. Please contact the author: firstname.lastname@example.org.