Here are some travel groups that cater to special needs travelers. Note that we have not traveled with any of these vendors so cannot recommend/not recommend, however, they all have several good reviews and/or are recommended by AARP.
Planet Abled – For all types of special needs travelers. Several destinations worldwide.
Seable Holidays – For the visually impaired.
Wheel the World – For wheelchair accessible travelers.
EasyAccessTravel.com – Cruise planners for special needs travelers.
IcelandUnlimited.is – Accessible travel in Iceland.
MoroccoAccesbiletravel.com – Accessible travel in Morocco.
TapoozTravel.com – For all types of special needs travelers.