DILF, DELF, DALF

http://www.ciep.fr/delfdalf/index.php
Official website of the french certifications, with mock exams.
Language interface : French, English, Spanish, German, Portuguese
Recommended for : A1, A2, B1, B2, C1, C2

TV5 Monde : TCF (Test de Connaissance du Français)

http://www.tv5.org/cms/chaine-francophone/enseigner-apprendre-francais/TCF-FLE/p-6817-Accueil-TCF.htm
Practice for the TCF exam thanks to structure, reading and listening activities. On the site, you also have informations about the exam and advices for you to succeed.
Interface language:  French
Recommended for: B2, C1, C2

RFI : Entrainez-vous au TCF (Test de Connaissance du Français)

http://www.rfi.fr/lffr/questionnaires/158/questionnaire_1251.asp
Practice for the TCF exam thanks to those listening activities from RFI and CIEP.
Interface language:  Arabic, Chinese, English, French, German, Italian, Portuguese, Russian, Spanish
Recommended for: B2, C1, C2