CommentFeb 5, 20162Heard great things about mailcow.emailIt's 2016 - What's an easy to configure and feature rich self hosted email solution
CommentFeb 4, 20162CSRF protection may or may not save you from spam attacks but should be present anyway.Is there any way to avoid captcha validation completely and still secure Forms from spams?
CommentFeb 4, 20164SQLite is a relational database but is simpler compared to MySQL. If you don't need persistence, check out Memcached . Also, it looks like what you are actually looking for is a KV store like HamsterDB .What is the simplest database to use?
CommentFeb 4, 20162Reading through these JS codes helped me understand how spreadsheet apps work: http://lhorie.github.io/mithril-blog/a-spreadsheet-in-60-lines-of-javascript.html http://jsfiddle.net/ondras/hYfN3/How is spreadsheet application implemented?