I wanted to let you know we've created a dedicated page for all developer documentation about our different APIs.
Apart from the best known one for the RIPE Database REST API, there is also documentation for the RIPE NCC LIR Portal API, giving you access to access to all your (private) resource information, such as ASNs, IPv4 and IPv6 allocations, Assignment Window history, PI assignments, Legacy space, etc.
In addition, there is also an IP Analyser API give you access to all the assignments you've made, what available free space you have in your allocations and an overview of all invalid assignments that require your attention.
Lastly, there are APIs for RIPE Stat and RIPE Atlas data, giving you access to a wealth of Internet measurements, data analysis and statistics.
Have a look at http://ripe.net/developers