Update: Insoshi's license has changed to the MIT license, which means you're basically free to do with it as you please. But still, review the license for any code you are considering before you get too invested in it.
Something to keep in mind when deciding is the license for the code. Insoshi is licensed under the GNU Affero General Public License, http://insoshi.com/license. This means that you have to distribute the source code to your Insoshi-based web application to anyone who uses that web application. You might not want to do that, in which case you'll need to pay Insoshi a license fee (they dual license, like MySQL).
LovdByLess is distributed under an MIT license, http://github.com/stevenbristol/lovd-by-less/tree/master/LICENSE. This means you can use the source code however you want to.