Add Todour

README.md

 - [hledger](https://hledger.org/) v1.21 ([Downloads](https://hledger.org/download.html), [GitHub releases](https://github.com/simonmichael/hledger/releases))
 - [Multiscreen Blank](http://multiscreenblank.nookkin.com/) v2.4.0.0 ([Releases](http://dl.nookkin.com/products/multiscreenblank/))
 - [scc](https://github.com/boyter/scc) v3.0.0 ([GitHub releases](https://github.com/boyter/scc/releases))
+- [Todour](https://nerdur.com/todour-pl/) v2.20 ([GitHub releases](https://github.com/SverrirValgeirsson/Todour/releases))
 - [W10Wheel.NET](https://github.com/ykon/w10wheel.net) v2.7.3 ([GitHub releases](https://github.com/ykon/w10wheel.net/releases))

bucket/todour.json

+{
+	"homepage": "https://nerdur.com/todour-pl/",
+	"description": "Todour is an application for handling todo.txt files on Windows, Mac and Linux. The format is especially practical for an approach similar to the one suggested in the book Getting Things Done  by David Allen, often referred to as GTD.",
+	"version": "2.20",
+	"license": "GPL-2.0-or-later",
+	"url": "https://nerdur.com/Todour-v2.20.zip",
+	"hash": "sha256:8B3F3AF7B758A66A0884C3139CFD8EEB2A72DAA4AF51492A290CB5089B8DB49B",
+	"shortcuts": [
+		[
+			"Todour.exe",
+			"Todour"
+		]
+	],
+	"checkver": {
+		"github": "https://github.com/SverrirValgeirsson/Todour"
+	}
+}