What are some alternatives?
When comparing SydneyEnterprise and SLIM21, you can also consider the following products
LIBRARIAN - Comment on any arXiv paper
LibraryH3lp - LibraryH3lp provides a flexible, affordable customer service software platform for libraries, educators, and non-profits that combines website chat, texting, email, and knowledge bases.
LibraryWorld - Library automation solution
Mandarin Library Automation - Mandarin Library Automation helps librarians and teachers to bring relevant, current information to libraries and classrooms.
Follett Destiny Library Manager - Follett Destiny Library Manager is a complete library management system that can be accessed from anywhere.
Evolve Library - Evolve Library is a library management system that is designed and built in-house with modules that are configurable to fit library environments.