The present OpenOffice doesn't have a Microsoft Access style suite....just a thought.
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OpenOffice Base?
PortableApps.com Advocate
Absolutely SqLite is perfect.
But also Openoffice Base is sufficient for 90% of users needs
And https://sourceforge.net/projects/freshmeat_kexi/ it's a good substitute
You can also use google docs or similar web application.
And also:
https://sourceforge.net/projects/basebuilder/
https://sourceforge.net/projects/hypatiadb/
https://sourceforge.net/projects/deckard/
It completely depends by what you really need
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