Aalize, most people have received most (if not all) of the following from Kenra: Moisturizing Shampoo & Conditioner, Color Maintenance Shampoo & Conditioner, Straightening Serum, Daily Provision, Volume Spray (or other holding). They do not offer samples of their Intensive Emollient Treatment or glossers. I don't believe they offer samples of the Platinum line either.
Nexxus will send whatever you ask for. You can take one of their consultations online to find out what they think is best for you, then ask for them. I've asked for and received samples of (Phyto Organics) Necatress (2), Hydruss, Enphuse & then Botanoil from their regular line. They don't offer samples of Emergencee, just to let you know.
Rayne, KeraCare will send samples of almost every product they have. I received the glossifier, humecto, 1st lather, lite oil moisturizer, regular oil moisturizer, leave in, something for itchy scalps, gel, and some other stuff. They are very generous and all three of the lines i mentioned send samples QUICKLY. Dont expect them to take any more than 2 weeks to get them to you.