Loopnote

Loopnote lets people create alerts. Say you’re in a band or you own an art gallery. You can use Loopnote to alert people about an upcoming show. The way it works is simple: You create a topic like “Governor’s Park Band” and let people subscribe to it. When you’re ready to promote an event just post a note to your topic like "Governor’s Park Band playing 2nite at 9pm, Larimer Lounge". All subscribers will receive an alert with your note. People can subscribe via email, IM, text or RSS.

Bands, notify your fans - Create a loop that your fans can subscribe to. Tag it as "Seattle, Blues, R&B" and let people discover you. Notify fans about upcoming shows.

You! Alert your friends - Invite your friends to subscribe to your personal loop, then send alerts anytime about who, when & where to meet.
Restaurants - promote your specials.
Nightclubs - advertise your bands.
Sports teams - notify members of cancelled practices.

HiperLink: http://loopnote.com/

Event Wax

Event Wax makes organising events quicker, easier, and an all round more pleasurable experience. It establishes an online presence for any event, allowing people to register and keep track of their tickets, and for you to easily track who's attending, all via a simple web interface.

Perfectly suited to conferences, workshops, courses, and any other event where communication with attendees is key to its success, Event Wax is currently free to use.

Once you’ve signed up for an account you can then add events to it by filling in details such as name, location, dates, etc. It’s all very straightforward. Event Wax will then set up an event administration area for you where you can keep track of bookings and keep in contact with attendees. A customisable web site for your event will also be created, from which attendees can register (and pay online, if necessary) straight away. Alternatively, you can just link to the registration pages directly from your own web site. For the day of the event, you can print or otherwise export any information you want like entire attendee lists, details of personal preferences, etc.

HiperLink: http://www.eventwax.com/

Diarised

Diarised allows you to schedule events with your friends and/or family in five simple steps: you enter the details of the event; Diarised sends an e-mail invitation to your invitees; the invitees choose the times that suit them best; Diarised will give you a summary of the best dates; and all meeting invitees will be sent an email confirming the chosen date and time.

HiperLink: http://diarised.com/

Spongecell

Spongecell is the easiest and most effective way of promoting your events. Create interactive and easily customizable event pages to engage your audience.

HiperLink: http://spongecell.com/