Huddersfield & District Archaeological Society
- Studies, explores and records the archaeology of the Huddersfield area. Information about their activities, publications, and news.
- http://www.huddarch.org.uk/

Huddersfield Geology Group
- A group of amateur geologists enthusiastic about exploring the geology of the Yorkshire Pennines; includes their programme, newsletters and articles.
- http://www.huddersfieldgeology.supanet.com/

Huddersfield Freecycle
- Local Yahoo! group recycling to keep stuff out of landfill.
- http://groups.yahoo.com/group/HuddersfieldFreeCycle/

Friends of Longley Woods
- Aims to protect and enjoy local woodland. Includes information about membership and events, including clean-ups and walks.
- http://www.myplace.uklinux.net/longleywoods/