Below is a list of all the political parties currently represented in the Dutch parliament.
50Plus (50+) = 50 Plus (a reference to age)
Christen Democratisch Appel (CDA) = Christian Democrats
ChristenUnie (CU) = ChristianUnion
Democraten ’66 (D66) = Democrats
GroenLinks (GL) = GreenLeft
Onafhankelijke Senaats Fractie (OSF) = Independent Senate Group
Partij voor de Arbeid (PvdA) = Party for Labour
Partij voor de Dieren (PvdD) = Party for the Animals
Partij voor de Vrijheid (PVV) = Party for Freedom
Staatkundig Gereformeerd Partij (SGP) = Political Calvinist Party
Socialistisch Partij (SP) = Socialist Party
The question of where these parties sit on the political spectrum is a tricky one, because Dutch politics traditionally does not fall neatly along a left-right axis. Instead, a second axis needs to be added: one that runs from progressive to conservative. One of the more recent examples of this was a study by Dutch political scientist Andre Krouwel at around the time of the 2012 general election. This was used in a blog post by the London School of Economics here — it also does a good job of showing the rightwards drift across Dutch politics over the last decade.
Generally, I will use the party abbreviations or the full name depending on how they are usually referred to in Dutch media. For example, GroenLinks and ChristenUnie are never referred to as GL and CU. On the flip side, the VVD and SGP are almost never referred to by their full names.