Most schools, companies, service providers and governments record and analyse as much as they can of your online behaviour: All your emails, chats with your friends, web pages you visit, things you search for, photos you look at and more – all are stored and linked with your identity.
By using these free tools you make it harder for others to observe your online life:
Tor – browse the Internet without revealing your location
Jitsi – make free voice calls without anyone listening in on your calls. Also, chat with your friends via Google Chat or Facebook chat without your conversations being recorded.
TrueCrypt – encrypt your files before storing them online (e.g. on DropBox or Google Drive), so that only you can read them
CryptoCat – have private text chats online, wherever you are (video)
GnuPG – encrypt your emails so that only your recipient can read them [ADVANCED]
TAILS – use computers of other people without compromising your security or privacy [ADVANCED]
Want guidance on how to use any of these tools? Have more to add to the list? Leave a comment.