Amsterdam Gay Pride Foundation
The official organiser of Gay Pride Amsterdam, as well as other key LGBTI events throughout the year.
Tel: +31 (0)6 1479 3189
Email: [email protected]
Website: www.amsterdamgaypride.org

A.S.V. GAY
A.S.V. Gay is the student association for gay, lesbian, bisexual, transgender and queer students in Amsterdam. Many of the group's members are international students. Members get together for weekly drinks and events held throughout the academic year.
Email: [email protected]
Website: www.asvgay.nl

COC Amsterdam
The country’s largest advocate of gay rights provides support to the LGBTI community living in the Netherlands. Club COC also organises social events.  
Tel: +31 (0)20 626 3087 
Email: [email protected]  
Website: www.cocamsterdam.nl

Gay Male Journal
Gay Male Journal is an initiative of the Gay Male Rights Project, an international network providing information on topics such as HIV/AIDS prevention, access to healthcare, discrimination and promoting diversity in the workplace. 
Website: www.gaymalejournal.org

Gay Swim Amsterdam  
Organised water polo, diving and competitive swimming at the Sloterparkbad: interested parties are welcome to join, but phone ahead to verify times and any fees which need to be paid.
Tel: +31 (0)6 2417 3268  
Email: [email protected]  
Website: www.gayswimamsterdam.nl

IHLIA
IHLIA is an international gay/lesbian library, archive, information and documentation centre about homosexuality and sexual diversity. Anyone can find here the information they need about gay men, lesbian women, bisexuals and transgenders, their history and culture.
Email: [email protected]
Website: www.ihlia.nl

Love Exiles Foundation / Stichting Love Exiles
The Love Exiles Foundation educates the public about immigration issues facing same-sex couples and provides them with support. The Dutch chapter organises social events and provides a support network for couples moving to the Netherlands. 
Email: [email protected] 
Website: www.loveexiles.org

Police Amsterdam
The local police department operates a project called 'Roze in Blauw', in which officers with an affinity with the local LGBTI community are available to help anyone harassed or discriminated against because of their sexuality.
Tel: +31 (0)88 169 1234
Website: www.politie.nl

Pride & Sports Amsterdam
Pride & Sports Amsterdam is an umbrella organisation including all of Amsterdam's LGBT sports clubs, including Rainbow Squash Amsterdam, Gay Volleyball Amsterdam (Dutch link) and Dutch Gay and Lesbian Athletics. The organisation hosts joint activities such as sports days, group activities and more.
Website: www.prideandsports.amsterdam (in Dutch)