The list below is a container for all kinds of enabling softwares. Many of them are open source. Probably the most interesting ones are the frameworks, platforms and libraries for typical 2.0-stuff .
But watch out for all other pearls: bug & issue trackers, business intelligence solutions, database solutions, catalogue wares, design toolboxes, enterprise solutions, media editors, hosting & domain management & testing tools, media management solutions, mobile content delivery tools, site tour builders, hardcore telephony solutions, voice recognition tools, and more incidental code snippets, like URL shorteners, widget builders, Ajax & RIA apps.
"This page describes the mastodon.social instance - wondering what Mastodon is? Check out joinmastodon.org instead! In essence, Mastodon is a decentralized, open source social network. This is just one part of the network, run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!"
'Find Your People and Talk About Your World
Life's best when you can talk about what's happening in your world with others who share your interests. Raftr connects you to the communities ("rafts") you care about. Find your people, both at your college and out in the real world. Get current on what's going on and which events you want to attend through your post feed.'
Tadvise is an advisor and assistant for Twitter. It analyses your followers and also the followers of your followers and reports you if the tweet that you are going to send is interesting (or relevant) for them or not. It also recommends you several followers, who can efficiently retweet your tweet... plus more features...