(Note: I am not Ukrainian. I have verified these to the best of my ability. Mix of Ukrainian and international orgs. This list is being continually updated. Inclusion of an org is not an endorsement of all their activities or positions but rather indicates that I believe they are working on the ground right now.)

OFFICIAL FUNDS FOR ARMY, MEDICAL, AND REBUILDING: The official way to donate to Ukrainian government funds for Defense and Demining, Medical Aid, and Rebuilding are here, with the chance to direct your funds for one of those purposes: https://www.uscis.gov/ukraine

General Humanitarian:

The National Bank of Ukraine has opened a fundraising account run by the Ministry of Social Policy for those affected by the war. https://bank.gov.ua/en/news/all/natsionalniy-bank-vidkriv-rahunok-dlya-gumanitarnoyi-dopomogi-ukrayintsyam-postrajdalim-vid-rosiyskoyi-agresiyi

Emergency Response/Medical:

Ukrainian Red Cross–The donation page is in Ukrainian hryvnias, not dollars https://redcross.org.ua/en/donate/

The following organizations are coordinating together: Razom, Nova Ukraine, United Help Ukraine, Revived Soldiers Ukraine, Sunflower of Peace, and Euromaidan-Warszava. https://razomforukraine.org/razom-emergency-response/

Food Aid:

https://wck.org/

Journalism:

Zaborona Media (https://zaborona.com/en/) fund for various journalistic needs here: https://2402.org/
Kyiv Independent: https://www.gofundme.com/f/kyivindependent-launch

Refugees:

To sponsor a Ukrainian family to come to the US: https://www.uscis.gov/ukraine

HIAS is supporting Right to Protections, their partner org in Ukraine: https://act.hias.org/page/6048/donate/1

Letjaha, activist collective in Poland driving people from the border and finding housing. Newer but seems to be doing good work. https://zrzutka.pl/en/xk4xmf

For those in Ireland to pledge rooms and housing: https://registerofpledges.redcross.ie/#/

For those in the UK to offer housing and sponsor visas for a family: https://homesforukraine.campaign.gov.uk/

Defense/army related funds:

Return Alive fund which “provide[s] material and technical assistance to the Armed Force” https://savelife.in.ua/en/

LGBT Military is an org of queer soldiers and veterans started in 2018. Their website is here with donation details on their Facebook page.

Jewish Community:

Hesed Ukraine: http://www.kievhesed.org.ua/en/
The Jewish Federation has a Ukraine-specific fund: https://connect.shalomdc.org/ukraine-emergency-fund

Queer/LGBTQ+ Community:

To help queer refugees and those in Ukraine: https://qua.community/news/aid-network/

To donate via QUA to Fulcrum, an organization on the ground in Lviv, select the “Direct Help LGBTQ in Ukraine” here. https://www.paypal.com/donate/?cmd=_s-xclick&hosted_button_id=ZNS7FXC4VLPYE

Disabled Community:

Fight for Right is a Ukrainian NGO that supports people with disabilities and has provided evacuation services for 90 disabled Ukrainians and their loved ones as of March 15th. https://www.gofundme.com/f/help-disabled-ukrainians

Children:
https://voices.org.ua/en/

Volunteers:

Ukrainian Volunteer Service coordinates volunteers within Ukraine. They assist civilians and soldiers both, with “special attention to helping elderly and disabled people” according to a friend who has seen them in action. https://secure.wayforpay.com/payment/uvs_support