The MyNewsletterBuilder Perl SDK by MyNewsletterBuilder allows API interaction to access email marketing capabilities. With the kit, that is available for download, developers could create online campaigns with newsletter services integrated.
Guerilla Mail is a simple idea with one purpose: to avoid spam. The idea is dead simple: go to the website, it gives you a random e-mail address that's good for one hour, and links to nothing else. Register for sites or whatever with it, and then never worry about it again. Although the web service is convenient, sometimes it's not everything you need. For those cases, one might want to look into using the Guerilla Mail API.
When planning an event, aside from all the fun stuff like the programme, the décor and the like, the bottom line is getting people to turn up; and no-one's going to make an appearance if they don't even know it exists. So marketing the event is key, and that's where evvnt comes in. It's an online event marketing service that focuses on getting the word out there by broadcasting and publishing a user's event to multiple event listing sites. The evvnt API makes this functionality available to be integrated with other sites and applications.