LinguistList is a big e-mail list where people post announcements or notices regarding events, conferences, calls for papers, job opportunities, new software products that helps linguists, and all the good things. They also have a student portal where they post research and writing resources. Since most schools and associations are on linguistlist, most summer schools are posted here too, and you can browse all of the ones you can apply to through this link. They also have a cookbook.
Dilbilim Derneği organizes conferences such as the International Conference on Turkish Linguistics (ICTL), Ulusal Dilbilim Kurultayı (UDK), and Dilbilim Öğrenci Konferansı (DÖK). They also host a list of departments and student communities of linguistics in Turkey.