Collabtive is an open source clone of BaseCamp (the 37 signals project management software) built in PHP backed by MySQL.
Coworking space in Brooklyn for $200/month about 30 minutes walk from Greenpoint.
Another coworking space in Brooklyn for $250/month, about 40 minutes by public transport from Greenpoint.
ProjectPier is a Free, Open-Source, self-hosted PHP application for managing tasks, projects and teams through an intuitive web interface. An opensource version of basecamp! Looks pretty basic, not nearly as ajaxy / designed as 37 signals.
Online coaching, feedback, performance reviews, that kind of jazz, for teams or businesses based around facebook or something of that nature.
The hub is a cross between a members club, an incubator, a serviced office, and a few other collaboration methods. Hat tip guaka.
Jelly is a bi-weekly working meeting where people get together to work in someone's house. It's a co-working type thing for people who can work remotely.
Shared artist facility including photography studio, wood shops, office space, etc. Temporary 3 month memberships are $180 or monthly basic is $39 a month.
Just glanced quickly, sounds very interesting. Combines over 14 projects to create an open source, cross platform web conferencing platform. Cool.
Interesting shopping comparison vertical focused entirely on heating oil. Includes smart examples of cross / up sells. Hat tip Dafydd.
A coworking, collaborative space in Bangkok, near the MRT!
Neat calendar service. Sync with desktop clients, mobiles, etc and then displays public availability and allows people to schedule events while handling timezones smoothly. Hat tip Anthony Feint.