I know it's not St Patrick's Day yet...nor even in any way spring. But it's also true that a lot of people like to make their cards well ahead of time. To help that along therefore, this new St Patrick's day digital pen-and-wash painting (minus the boundingsquirrel watermark, obviously) is available as a downloadable card front sheet here. The sheet includes plenty of other messages and tags, and room for your own embellishments, so you can also use it to wish someone luck at any time of year.
If you're feeling sick of winter, these summer flowers are for you. They come in a sheet with sentiment tags for every occasion from "Happy Birthday" to "Congratulations!". Sure to cheer up any recipient, whatever the weather, they're available here.